Lost Void/Battlefront Purge

Battlefront Purge is one of the game modes available in Lost Void.

Overview

Battlefront Purge is a rogue-like game mode in which the player must progress through different stages, collecting various Resonia to increase Agents' strength in battle. Additionally, one General Gear and one Exclusive Gear must be chosen at the start of the challenge. Each challenge consists of two (Difficulty I-II) or three (Difficulty III-VI) map floors, with four to five stages per floor, culminating in a boss fight at the end of the floor.

Battlefront Purge has a total of six difficulties, which progressively get more challenging by increasing the enemy level, but also give higher rewards upon completion. Each completed challenge gives Shadow Crystal Data, which is used to increase the Lost Void License Level and complete the weekly Bounty Commissions for rewards.

Seasonal Buffs

Before entering gameplay, one of three seasonal buffs can be chosen, which will remain active for the duration of the challenge. These three buffs rotate with each weekly reset.

• When Freeze is triggered, Agent CRIT DMG increases by 50% and Anomaly Proficiency increases by 30 for 20s.
• Increases the Agent's Daze by 25%, and DMG dealt against stunned enemies by 40%.
• Increases the Agent's Daze against enemies not stunned by 25%, and DMG dealt against stunned enemies by 40%.
• The DMG dealt by Chain Attacks and Ultimates is increased by 60%
• Increases Agent Anomaly Proficiency by 20. When Disorder triggers against enemies, Electric DMG increases by 40% for 20s.
• Agent Anomaly Buildup Rate increases by 40% when hitting an enemy suffering an Attribute Anomaly.
• Launching an EX Special Attack increases the Agent's DMG by 40% for 18s.
• Agent Ice DMG increases by 25%. When launching an EX Special Attack, CRIT DMG increases by 30% for 20s.
• · Increases Agent Impact by 20%. Upon stunning an enemy, regenerates all squad members' Energy by 10 and ATK by 20% for 20s. The Energy Generation effect can trigger once every 20s.
• Triggering Quick Assist increases all squad members' DMG by 10% for 15s, stacking up to 4 times. Repeated triggers reset the duration.
• Increases Agent Anomaly Buildup Rate by 20%, and Attribute Anomaly DMG by 30%.
• Increases Daze from Basic Attack by 25% and DMG from Chain Attack by 50%.
• When triggering a Perfect Dodge, Agent DMG increases by 15% and DMG received is reduced by 5% for 15s, stacking up to 3 times. The duration of each stack is calculated separately.
• Agent Fire DMG increases by 20%. When launching an Chain Attack, CRIT DMG increases by 35% for 10s.
• Agent Anomaly Proficiency increases by 60, and Anomaly Buildup Rate increases by 20%.
• When an Agent triggers Disorder, all squad members restore 10 Energy.
• Agent ATK increases by 10%. When attacked, the Agent gains a shield equal to 10% of Max HP for 20s. Can trigger once every 20s.
• The Agent's Daze value dealt increases by 10%. When a Basic Attack hits an enemy, all squad members' DMG dealt increases by 1.5% for 10s, stacking up to 20 times. Repeated triggers reset the duration.
• The Agent's Anomaly Buildup generated by EX Special Attack, Chain Attack, and Ultimate increases by 30%, and DMG dealt by these skills increases by 20%.
• Agent Electric DMG increases by 20%. When launching an EX Special Attack, CRIT DMG increases by 35% for 20s.
• When a Chain Attack hits an enemy, the target's DEF is reduced by 25% for 15s.
• Agent Energy Generation Rate increases by 20%. When using EX Special Attack, Agent Fire Anomaly Buildup Rate increases by 20%, Anomaly Proficiency increases by 60 points, lasting 20s.
• Agents' Aftershocks deal 40% more Daze, and when an Aftershock hits an enemy, it reduces the enemy's DEF by 20%, lasting 20s.
• Agent Ether DMG increases by 20%. When executing an EX Special Attack or Chain Attack, CRIT DMG increases by 30%, lasting 20s.
• Agent Anomaly Proficiency increases by 60. When executing an EX Special Attack, the Ether DMG dealt by all squad members increases by 20%, lasting 20s.
• Agents with the Attack specialty deal 20% increased DMG. If the enemy is Stunned, this DMG increases by an additional 40%.
• Agent Ether DMG increases by 20%, Max HP increases by 20%.
• Agent ATK increases by 15%. Obtaining a shield grants the whole squad 20 Energy and an additional 15% ATK, lasting 20 seconds. This effect can trigger once every 20 seconds.

Investigation Strategies

Investigation Strategies are set buffs and/or effects that will occur under specific circumstances. One Investigation Strategy must be selected for each run of Lost Void. When selecting an Investigation Strategy, the total number of Explorer’s Badges unlocked for that strategy is displayed in the top right. There are 12 Investigation Strategies in total.

Icon	Investigation Strategy	Description
	Sneak Attack Strategy	For every Combat area cleared, all squad members' Daze dealt increases by 3% and DMG dealt to Stunned enemies increases by 5%, stacking up to 5 times. Stacks reset when an Agent in the squad is defeated. "Seize the moment: Even the mightiest Ethereal is vulnerable when they realize they're about to fall."
	Upper Hand Strategy	After entering the combat area and before taking damage 5 times, all squad members gain 50 Anomaly Proficiency, and the Disorder effect deals 20% increased DMG. The hit counter and buff reset each time you enter a combat area. "Such powerful equipment requires strict maintenance — better land some hits before the Ethereals wreck our support gear!"
	Speed Combo Strategy	Aftershock DMG dealt increases by 30%, Daze dealt increases by 30%. When any squad member lands an Aftershock hit on an enemy, the target's All-Attribute RES is reduced by 2.5%, stacking up to 5 times. This effect can trigger once every 5s. "In the Hollow, 'don't chase a desperate foe' is neither courteous nor advantageous; on the contrary, it saves quite a bit of re-aiming time."
	Resonium Passion Strategy	Coin combat areas have a 40% chance to grant 1 Resonium. Entering Friendly Talk areas also grants 1 General Resonium. "Make sure to use the Resonia. They come from the Hollows, and, naturally, are the best weapons for fighting back against the Hollows."
	Treasure Hunter Strategy	There is a 10% chance of obtaining 1 Card in combat areas. Obtain 1 Card when entering a Rest and Recuperation area. "Is the purpose that drives this operation just an investigation, or is it the promise of a great bounty...? Are these two things mutually exclusive?"
	Fully Armed Strategy	Challenge - Flawless areas have an increased chance to grant Gear. Bangboo Assist will be fully charged when entering combat. "Being armed to the teeth allows anyone to transform into a walking tank."
	Entrepreneurs Strategy	Entering a Hollow grants 1,500 Gear Coins, increases the number of items sold in the Store by 1, and Bangboo merchants have a 20% chance of offering a 40% discount. "The great thing about getting on the good side of Bangboo merchants is that they really will treat you like a god."
	Recovery Strategy	Rest and Recuperation areas grant 1 additional selection, with a 25% chance to obtain Gear. "Ample supplies can make rest between battles much more efficient. But whatever you do, don't drift off for too long."
	Looting Strategy	When entering an "Encounter" or "Price Difference" area, recover 10% HP and obtain 500 Gear Coins. "Cast aside the dignity of legitimacy... The ruthless mindset of a Hollow Raider will always net you a more plentiful bounty. Isn't that right?"
	Defense Strategy	Upon entering the battlefield, all squad members gain a shield equal to 10% of their Max HP. "Use a defensive formation to neutralize the enemy's offense and prepare for your counterattack in the prolonged battle to come."
	Ambush Strategy	Agents' initial HP is reduced to 80%, but DMG dealt is increased by 25%. "The acceptance of certain death with every step only strengthens them into something truly formidable."
	Reinforcement Strategy	The DMG dealt by Bangboo is increased by 100%. Each time a battle is won, the DMG dealt by Bangboo increases by an additional 25%, and the DMG dealt by Bangboo Chain Attacks is increased by 10%. This can be triggered up to a maximum of 10 times. "Don't underestimate these little guys, they were born for battle in the Hollows."

Ether Activity

Ether Activity Effects are selectable effects that enhance enemies or otherwise add detriments to gameplay. Each activity effect selected increases the intensity level by 1, and increases the amount of Shadow Crystal Data gained by 500. Having 1 to 3 effects is Low Intensity, 4 to 6 is Medium, 7 to 9 is High, and 10 to 12 is Extreme.

• Normal and elite enemies will self-destruct upon defeat.
• Friendly Talk no longer provides Health Recovery.
• Bosses have a significantly increased Daze limit and recover from Stun faster.
• The store is no longer available in Friendly Talk, and all stores can only be refreshed once.
• All enemies gain significantly increased Anomaly Buildup RES and gain further increased Anomaly Buildup RES when Stunned.
• All enemies gain a substantial Shield. When Shielded, their Anti-Interrupt Level increases.
• Attacks from Elite enemies and Bosses significantly reduce Agents' Energy and Decibels.
• Golden and red prompts will no longer be displayed during all enemy attacks.
• Elite and Boss enemies enter the Demonized state, only exiting this state when Stunned.
• In [Combat: Crisis on the Road] and [Combat: Final Battle], on-field characters will gradually lose HP.
• All enemies are enhanced in all aspects.
• Bosses in [Combat: Crisis on the Road] will be enhanced.

Exclusive Gear

Exclusive Gear is tailored to specific Agents, enhancing their abilities and granting them additional effects in combat. The corresponding Agent must be present in the team in order to obtain their Gear. Once a set of Agent Exclusive Gear is chosen, other Agents' Gear cannot be chosen for the rest of the challenge.

49 Gear match the category selection:

Icon	Name	Availability	Effect
	Hoshimi Miyabi: Endless Blizzard	Lost Void	After triggering Frostburn - Break, Hoshimi Miyabi's next EX Special Attack will not consume energy and deals 50% increased DMG to enemies with an Attribute Anomaly. This effect can trigger once every 30s.
	Hoshimi Miyabi: Unbreakable Ice	Lost Void	Enemies afflicted with Icefire take Frost DMG equal to 50% of Hoshimi Miyabi's ATK each second. Upon triggering Frostburn - Break, Hoshimi Miyabi can bypass the restrictions of Frostburn and immediately reapply Icefire to enemies.
	Hoshimi Miyabi: Snow Debris	Lost Void	When activating Ultimate: Lingering Snow, Hoshimi Miyabi gains 6 stacks of Fallen Frost. While performing Basic Attack: Shimotsuki, Hoshimi Miyabi gains 70/140/210 Decibels based on the charge level of the attack.
	[Billy] Overwhelming Firepower	Lost Void	When Billy lands 20 hits on enemies with Basic Attack: Full Firepower or 5 hits with Basic Attack: Full Firepower - Modified, the next use of EX Special Attack will not consume energy, and the skill's DMG will be increased by 100%.
	[Billy] Gunslinger Time	Lost Void	When Billy hits an enemy with EX Special Attack, a debuff is applied to the target, increasing Billy's DMG dealt to the target by 60% for 10 seconds.
	[Billy] Judgement by Eradication	Lost Void	When activating EX Special Attack, hold Special Attack to charge, increasing the skill's power. The DMG Multiplier for EX Special Attack increases by 200%, and guaranteeing a critical hit.
	[Ellen] Blizzard Trim	Lost Void	With Flash Freeze Charge, the third move of Basic Attack: Flash Freeze Trimming replaces Dash Attack: Cold Snap. During this skill , gain a shield equal to 20% of Max HP. While Ellen has this shield, her Anti-Interrupt Level increases, and DMG taken is reduced by 60%. Activating Dodge Counter: Reef Rock grants Ellen 1 Flash Freeze Charge.
	[Ellen] Everwinter Windtrace	Lost Void	When activating EX Special Attack, Chain Attack, or Ultimate, Ellen leaves behind a patch of Icy Mist on the ground, dealing Ice DMG over time to enemies and reducing their Ice RES by 30% for 10 seconds. When Ellen attacks an enemy within the Icy Mist, the Icy Mist will trigger an extra instance of DMG.
	[Ellen] Blood-Seeking Fangs	Lost Void	With Hunter's Fin, applying a Hunting mark to an enemy increases Ellen's DMG by 15%, lasting for 15s. When a marked target is defeated, the current DMG buff gets an additional increase of 5%, with a maximum additional increase of 150%.
	[Tsukishiro Yanagi] Moon Across the Sky	Lost Void	After triggering Chain Attack three times, Tsukishiro Yanagi's next Chain Attack will be replaced with an Ultimate.
	[Tsukishiro Yanagi] Flowing Change	Lost Void	During Basic Attack: Tsukuyomi Kagura, Tsukishiro Yanagi can interrupt the current action at any time to chain into Special Attack: Ruten.
	[Tsukishiro Yanagi] Moonlight Illusion	Lost Void	When Tsukishiro Yanagi's attack hits an enemy and triggers Polarity Disorder, the target's All-Attribute RES is reduced by 16%, lasting for 8 seconds.
	Astra Yao - Perfect Save	Lost Void	DMG dealt by Basic Attack: Radiant Moment will be considered as EX Special Attack DMG. During this skill,all squad members' Crit Rate is increased by 18%.
	Astra Yao - Scattered Melody	Lost Void	With enough energy, releasing or following up with a Tremolo attack while in the Idyllic Cadenza state will additionally deal two instances of identical Tremolo DMG. When Astra Yao hits enemies with Basic Attack: Interlude or Basic Attack: Chorus, there's a 20% chance to gain the Inspiration effect, allowing her next Dodge to directly trigger Perfect Dodge, which can be followed up with Basic Attack: Chorus, lasting 10s.
	Astra Yao - Aria of the Gentle Wind	Lost Void	While in the Idyllic Cadenza state, Astra Yao's Anti-Interrupt Level increases and she takes 20% less DMG. All squad members' PEN Ratio increases by 15%, and they gradually recover HP.
	Evelyn - Sheathed Blade	Lost Void	When activating a Chain Attack, Evelyn gains the Swift Blade effect, increasing Chain Attack DMG by 20%. This effect can stack up to 3 times and lasts for the entire combat.
	Evelyn - Binding Arts	Lost Void	When Evelyn enters Binding Seal, her ATK increases by 20%, while the target enemy's ATK decreases by 20%. After exiting Binding Seal, Evelyn retains her buff for 10s. Upon exiting Binding Seal, she detonates the target enemy, dealing additional Fire DMG.
	Evelyn - Special Energy Drink	Lost Void	When activating Ultimate, Evelyn gains 100% Burning Embers and 3 Burning Tether Points.
	Jane - Gaming Time	Lost Void	When triggering Core Passive: Insight's Assault CRIT effect, there is a 50% chance to increase CRIT DMG by an additional 40%.
	Jane - Combat Technique	Lost Void	When hitting an enemy with a Dodge Counter, the target's Physical RES is reduced by 20% for 10s.
	Jane - Relentless Pursuit	Lost Void	When any squad member inflicts an Attribute Anomaly on an enemy, Jane gains 40 additional Decibels, and her next Ultimate's CRIT Rate is increased by 5% and CRIT DMG is increased by 20%, stacking up to 5 times.
	Corin - Maid's Dainty Steps	Lost Void	When a Perfect Dodge is triggered, recover 25 Energy. Can be triggered once every 6s.
	Corin - Unfortunate Laceration	Lost Void	When Corin hits enemies with Chainsaw extended slashes, she gains 1 stack of Charge. At 10 stacks, the next slash applies the Laceration effect on enemies, dealing Physical DMG equivalent to 20% of Corin's ATK every 3s, stacking up to 10 times and lasts 12s. Repeated triggers reset the duration.
	Corin - Cursed Tetanus	Lost Void	When hitting enemies with a Basic Attack or Dash Attack, the target's Physical RES is reduced by 20% for 15s.
	Hoshimi Miyabi: Awakening of the Bees	Lost Void	Replaces Dash Attack: Fuyubachi with Dash Attack: Fuyubachi — Maximum. Upon activating this skill, Hoshimi Miyabi will dash forward and deal Frost DMG to enemies. After the skill is replaced, when Hoshimi Miyabi is knocked back or launched, using Basic Attack or Special Attack while a target is staggered will immediately trigger Dash Attack: Fuyubachi — Maximum, restoring 70% of the DMG she just received in HP and granting invulnerability for 0.5s.
	Hoshimi Miyabi: Dance of the Sparrows	Lost Void	When Hoshimi Miyabi is attacked by an enemy, she will automatically dodge the attack, triggering Perfect Dodge and Vital View. Vital View lasts for 3s. The automatic dodge effect can trigger once every 12s. When the effect is triggered, Hoshimi Miyabi's DMG is increased by 80%, lasting for 20s.
	Hoshimi Miyabi: Sparrows in the Flowers	Lost Void	After Hoshimi Miyabi activates Dodge Counter: Kan Suzume and Quick Assist: Dancing Petals, she will automatically chain into the ALT Frost Storm, unleashing a blast of air to attack nearby enemies and inflicting a substantial amount of Daze. When the enemy is Stunned, Hoshimi Miyabi gains 3 Fallen Frost, and the target's Stun DMG Multiplier is increased by 75%.
	[Billy] Explosive Bullets	Lost Void	Replaces Basic Attack: Full Firepower with Basic Attack: Full Firepower - Modified. This decreases the rate of fire to increase bullet power. Upon activating this skill, Billy will directly enter Crouching Shot, triggering Core Passive: Steady Shot and increasing his DMG dealt by an additional 50%. The buff will end when he moves, returns to idle, or is knocked back or launched.
	[Billy] Rotating Drivetrain	Lost Void	When Billy uses his EX Special Attack/Assist Follow-Up/Chain Attack/Ultimate, he gains 2/2/4/4 stacks of Charge (up to 4 stacks). When Billy performs a piercing attack in a large area around him during Dash Attack: Starlight Sanction, press Basic Attack to consume 1 stack of Charge and trigger the skill repeatedly, increasing its DMG by 150%. When the effect is triggered, Billy's CRIT Rate increases by 20% for 10s. The effect stacks up to 2 times. Repeated triggers reset the duration.
	[Billy] Mysterious Transmorpher	Lost Void	When Billy enters Crouching Shot during his Basic Attack, he triggers Core Passive: Steady Shot. After maintaining the buff for 1.5 seconds, he enters the Starlight Descent state, during which his attacks ignore 50% of the target's Physical RES. Additionally, he continuously generates Decibels, starting at 20 points/second and gradually increasing to 50 points/second, reaching the maximum after 3 seconds. This effect lasts until he is knocked back or launched.
	[Ellen] Blade of Frost	Lost Void	The third move of Basic Attack, EX Special Attack: Sharknami, Dodge Counter: Reef Rock, Quick Assist, and Assist Follow-Up triggers an additional Icy Blade, dealing Ice DMG to a large area in front and lowering the target's DEF by 30% for 15s. When the additional Icy Blade is triggered, the CRIT DMG of the move increases by 25%, stacking up to 3 times and lasting for 15s, with repeated triggers refreshing the duration. The additional Icy Blade does not affect this skill's ALT.
	[Ellen] Blade of Frost: Advanced	Lost Void	Icy Blade will also automatically activate after the third hit of Basic Attack: Saw Teeth Trimming or a Quick Assist, dealing multiple hits of Ice DMG to enemies in a large area ahead. Icy Blade reduces DEF by 30% for 15s upon hit. When the additional Icy Blade is triggered, the skill's CRIT DMG increases by 25%, stacking up to 3 times and lasting 15s. Repeated triggers reset the duration.
	[Ellen] Dangerous Bearings	Lost Void	When Roaming, Ellen gains 2 Flash Freeze Charge and Quick Charge every 0.5 sec. When Ellen hits an enemy with Swift Scissors or Charged Scissor Strike during Dash Attack: Arctic Ambush, she leaves an Icy Mist on the ground, which deals Ice DMG over time to enemies and reduces their Ice RES by 30% for 10s. Ellen's Anti-Interrupt level increases and she gains 50% DMG reduction while in the Icy Mist. This effect continues for 5s after leaving the Icy Mist.
	[Ellen] Hunter's Fin	Lost Void	Every 15s, Ellen applies a Hunting mark that lasts for 15s to a random enemy. When hitting an enemy marked with Hunting with EX Special Attack or Swift Scissors/Charged Scissor Strike during Dash Attack: Arctic Ambush, using Basic Attack or Special Attack again allows Ellen to consume nothing and immediately trigger the skill again with its CRIT DMG increased by 25%. If the target is defeated, Ellen will instantly apply a Hunting mark to the next enemy. When she has Flash Freeze Charge, each extra point of Flash Freeze Charge increases Ellen's ATK by 5%. This effect lasts for 10s and stacks up to 9 times. The duration of each stack is calculated separately.
	[Tsukishiro Yanagi] Soaring Moonlight	Lost Void	During EX Special Attack: Gekka Ruten, after performing a quick thrust, Tsukishiro Yanagi hovers in midair, continuously channeling thunderbolt strikes into the ground, and dealing Electric DMG. Tsukishiro Yanagi triggers the downward smash from EX Special Attack: Gekka Ruten by releasing or pressing Special Attack again, or when the duration limit is reached. When her thunderbolt strikes hit enemies, it increases the Disorder DMG they take by 3%, stacking up to 20 times and lasting 6s. Repeated triggers reset the duration.
	[Tsukishiro Yanagi] Kagura's Dance	Lost Void	While triggering the fifth move of a Basic Attack in the Jougen stance or triggering the fourth move of a Basic Attack in the Kagen stance, repeatedly press or hold Basic Attack to extend the skill duration, slash continuously, and increase Electric DMG dealt by Tsukishiro Yanagi by 4%, stacking up to 15 times and lasting 8s. Repeated triggers refresh the duration. During consecutive slashes, DMG taken by Tsukishiro Yanagi is reduced by 40%, and after triggering Swift Ruten, pressing Basic Attack transitions to continuous slashes of the alternate stance.
	[Tsukishiro Yanagi] Flowing Reflection	Lost Void	When activating Special Attack: Ruten, Tsukishiro Yanagi gains 1 Charge (max. 3 stacks). Upon reaching 3 Charges and triggering Swift Ruten, press Basic Attack to consume all Charges and immediately follow up with Chain Attack: Celestial Harmony. If an enemy attack is successfully parried during Swift Ruten, following up with Chain Attack: Celestial Harmony will not consume any Charge, and Chain Attack: Celestial Harmony's DMG will increase by 50%.
	Astra Yao - Radiant Moment	Lost Void	For every 25 Energy consumed, Astra Yao gains 1 stack of Starlight, up to 3 stacks. During Idyllic Cadenza, hold to unleash Basic Attack: Radiant Moment, continuously channeling an energy beam to attack enemies. Upon activating this skill, Starlight will be consumed, with each stack of Starlight extending the skill duration by 1s. During this skill, Anti-Interrupt Level is increased, and DMG taken is further reduced by 20%. When the skill hits enemies, target's DEF is reduced by 40%. After gaining 3 stacks of Starlight, switching back to Astra Yao will automatically trigger Basic Attack: Radiant Moment.
	Astra Yao - Hollow Symphony	Lost Void	For every 25 Energy consumed, Astra Yao gains 1 stack of Starlight, stacking up to 3 times. Each stack of Starlight increases the DMG dealt by Tremolo by 15% when released and additionally released while she is in the Idyllic Cadenza state. Holding to perform Basic Attack: Finale or Basic Attack: Radiant Moment consumes Starlight. Each stack of Starlight increases the attack's DMG by 15% and restores 4 Energy to Astra Yao. When Astra Yao hits enemies with Basic Attack: Interlude, an additional 25 Energy will be consumed. When hitting enemies with Basic Attack: Chorus, an additional 4 Energy will be restored.
	Astra Yao - Harmonic Echo	Lost Void	During Idyllic Cadenza, increases CRIT Rate of all squad members by 20%. When CRIT Rate reaches 100%, each 1% over 100% will increase CRIT DMG by 2%, up to 100%. When the active character hits enemies with EX Special Attack, Astra Yao will recover 1 Energy and launch an additional Tremolo attack. This effect can trigger once every 1s.
	Evelyn - Low-Combustion Coating	Lost Void	When Evelyn consumes Burning Tether Point to activate Chain Attack: Lunalux - Snare, it will be replaced by Chain Attack: Lunalux - Entanglement, significantly reducing skill duration. When Evelyn's Chain Attack hits enemies, the attack's DMG increases by 80%.
	Evelyn - Portable Detonator	Lost Void	When Evelyn exits Binding Seal, she enters Ignite Preparation for 20s, during which the next Dash Attack: Piercing Ambush will be replaced with Dash Attack: Ambush Blast. Dash Attack: Ambush Blast is considered a Chain Attack. When Evelyn uses Basic Attack: Garrote, she will exit Binding Seal.
	Evelyn - Ultimate Contingency Protocol	Lost Void	When Evelyn is about to be staggered by a frontal attack, she will consume Assist Point to automatically trigger Defensive Assist, blocking enemy attacks and enabling an ALT Assist Follow-Up: Course Disruption. When Evelyn activates Defensive Assist, her CRIT DMG increases by 50%, stacking up to 2 times for 20 seconds. The duration of each stack is calculated separately.
	Jane - Phantom Armor	Lost Void	Significantly increases the sustained attack duration of Basic Attack: Salchow Jump. Triggering a Finishing Move when about to be attacked activates Perfect Dodge. When the sustained attack duration reaches maximum or Perfect Dodge is triggered by a Finishing Move, the Finishing Move will be enhanced to Salchow Jump: Airborne. When this skill is activated, Physical Anomaly Buildup Rate is increased by 50% for 10s.
	Jane - Boiling Predatory Instinct	Lost Void	When triggering a Perfect Dodge or activating a Defensive Assist, Passion Stream is greatly increased, replacing the Passion state with the Overload Passion state. In this state, Jane's ATK is additionally increased by 35%. Passion Stream will automatically decrease over time, and hitting enemies with attacks no longer consumes Passion Stream.
	Jane - Venomous Edge	Lost Void	During the Passion or Overload Passion state, EX Special Attack: Aerial Sweep will be enhanced to EX Special Attack: Aerial Sweep-Onslaught. When using this skill, Jane will re-enter the Passion or Overload Passion state. When this skill hits enemies, the target's All Anomaly Buildup RES is reduced by 40% for 15s.
	Corin - Chainsaw Operation Manual	Lost Void	Replace Dash Attack: Oopsy-Daisy! with Dash Attack: Oopsy-Daisy! — Unleashed. Hold Basic Attack to maintain sprint mode, ending when the chainsaw has continuously slashed enemies 30 times or when the button is released.
	Corin - Overload Driver	Lost Void	During EX Special Attack, holding Special Attack to continuously slash enemies for over 0.5 seconds will trigger the Overclock State, continuously gathering enemies. When the attack hits enemies 10 times, it will trigger Overclock Overload, additionally dealing one instance of Physical DMG equivalent to 400% of Corin's ATK.
	Corin - Blasting Blowers	Lost Void	During the 1st, 2nd and 3rd hits of a Basic Attack, Dash Attack, Dodge Counter, or Quick Assist, repeatedly press or hold Basic Attack to directly trigger the 4th hit of the Basic Attack, and unleash a high-speed swirling slash towards enemies in front.

Trial Agents

All S-rank Agents that have Exclusive Gear in Battlefront Purge can be used in trial mode, up to Difficulty IV.

Exploration Mission

Exploration Mission features five sets of varying objectives that grant rewards for first-time completion.

Battlefield Encounter

Objective	Rewards
At Difficulty IV or above, equip the Gear Astra Yao: Radiant Moment and use Basic Attack: Radiant Moment 3 times in a single combat.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Astra Yao: Radiant Moment and hit 5 or more enemies with Basic Attack: Radiant Moment.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Evelyn: Low-Combustion Coating and use Chain Attack: Lunalux - Entanglement 3 times in a single combat.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Evelyn: Portable Detonator and use Dash Attack: Ambush Blast 3 times in a row.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Jane: Venomous Edge and use EX Special Attack: Aerial Sweep - Onslaught 3 times in a single combat.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Jane: Phantom Armor and use Basic Attack: Salchow Jump 3 times in a single combat.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Corin: Overload Driver and trigger Overclock Overload 3 times in a single combat.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Corin: Chainsaw Operation Manual and hit 3 or more enemies with Dash Attack: Oopsy-Daisy! - Modified.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear [Ellen] Blade of Frost and launch Icy Blade 5 times in a single combat.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear [Ellen] Hunter's Fin and launch EX Special Attack 4 times in a row.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear [Hoshimi Miyabi] Awakening of the Bees and use Dash Attack: Fuyubachi — Maximum 5 times in a single combat.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, consume 18 points of Fallen Frost within 25 seconds as Agent Hoshimi Miyabi.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear [Tsukishiro Yanagi] Soaring Moonlight and use EX Special Attack: Gekka Ruten 3 times and trigger thunderbolt strikes in a single combat.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear [Tsukishiro Yanagi] Kagura's Dance and repeatedly perform the last move of Basic Attack for over 5 seconds.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Billy: Mysterious Transmorpher and maintain Starlight Descent state for over 25 seconds.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
At Difficulty IV or above, equip the Gear Billy: Rotating Drivetrain and use Dash Attack: Starlight Sanction 4 times in a row.	Hi-Fi Master Copy 1 W-Engine Energy Module 4 Denny 15000

First Encounter

Objective	Rewards
Upgrade General Gear to Lv. 2 for the first time	Shadow Crystal Data 500 Senior Investigator Log 4 Denny 10000
Obtain Exclusive Gear for the first time	Shadow Crystal Data 500 Senior Investigator Log 4 Denny 10000
Complete Card Purification for the first time	Shadow Crystal Data 500 Senior Investigator Log 4 Denny 10000
Complete an Expertise Boost in Combat Potential for the first time	Shadow Crystal Data 500 Senior Investigator Log 4 Denny 10000
Unlock Gear for the first time	Shadow Crystal Data 500 Senior Investigator Log 4 Denny 10000

Repeated Trials

Objective	Rewards
Obtain a total of 12,000 Gear Coins in Hollow Zero: Lost Void	Polychrome 15 Shadow Crystal Data 1000 Senior Investigator Log 4
Upgrade Gear 9 times in Hollow Zero: Lost Void	Polychrome 15 Shadow Crystal Data 1000 Senior Investigator Log 4
Clear Hollow Zero: Lost Void with a total of 8 different Exclusive Gear	Polychrome 15 Shadow Crystal Data 1000 Senior Investigator Log 4
Obtain a total of 72 Resonia in Hollow Zero: Lost Void	Polychrome 15 Shadow Crystal Data 1000 W-Engine Energy Module 4
Unlock a total of 8 pieces of Gear in Hollow Zero: Lost Void	Polychrome 20 Shadow Crystal Data 1000 Bangboo System Widget 4
Obtain a total of 9 Cards in Hollow Zero: Lost Void	Polychrome 20 Shadow Crystal Data 1000 Senior Investigator Log 4
Purchase a total of 45 items from Bangboo merchants in Hollow Zero: Lost Void	Polychrome 20 Shadow Crystal Data 1000 Senior Investigator Log 4
Clear Hollow Zero: Lost Void with 6 different Investigation Strategies	Polychrome 20 Shadow Crystal Data 1000 Senior Investigator Log 4
Purify a total of 12 Cards in Hollow Zero: Lost Void	Polychrome 25 Shadow Crystal Data 1000 W-Engine Energy Module 4
Complete a total of 15 challenge areas in Hollow Zero: Lost Void	Polychrome 25 Shadow Crystal Data 1000 Bangboo System Widget 4

Tough Challenge

Objective	Rewards
Complete the "Battlefront Purge: Difficulty III" challenge	Polychrome 25 Hi-Fi Master Copy 3 Denny 20000
Complete the "Battlefront Purge: Difficulty V" challenge	Polychrome 25 Hi-Fi Master Copy 3 Denny 20000
Clear "Battlefront Purge: Difficulty V" at "Ether Activity: 1"	Polychrome 25 Hi-Fi Master Copy 3 Denny 20000
Clear "Battlefront Purge: Difficulty V" at "Ether Activity: 3"	Polychrome 25 Hi-Fi Master Copy 3 Denny 20000
Clear "Battlefront Purge: Difficulty V" at "Ether Activity: 5"	Polychrome 25 Hi-Fi Master Copy 3 Denny 20000
Clear "Battlefront Purge: Difficulty V" at "Ether Activity: 7"	Polychrome 25 Hi-Fi Master Copy 3 Denny 20000

Special Objectives

Objective	Rewards
Obtain 12 items in a single successful challenge in Hollow Zero: Lost Void	Senior Investigator Log 4 Denny 15000
Enter 7 combat or challenge areas in a single successful challenge of Hollow Zero: Lost Void	Senior Investigator Log 4 Denny 15000
Enter 5 Encounter or Price Difference areas in a single successful challenge in Hollow Zero: Lost Void	Senior Investigator Log 4 Denny 15000
Obtain 3 Cards in a single successful challenge of Hollow Zero: Lost Void	Senior Investigator Log 4 Denny 15000
Purify 3 Cards in a single successful challenge of Hollow Zero: Lost Void	W-Engine Energy Module 4 Denny 15000
Upgrade 2 General Gear to their highest level in a single successful challenge of Hollow Zero: Lost Void	W-Engine Energy Module 4 Denny 15000
Obtain 5 pieces of Agent Exclusive Gear in a single successful challenge of Hollow Zero: Lost Void	W-Engine Energy Module 4 Denny 15000
Complete 4 challenge areas in a single successful challenge of Hollow Zero: Lost Void	W-Engine Energy Module 4 Denny 15000

Unveil the Truth

Objective	Rewards
Clear Battlefront Purge: Difficulty VI and earn 1 [Phantom] Resonium in a single session.	Polychrome 15 Senior Investigator Log 4 Denny 15000
Clear Battlefront Purge: Difficulty VI and refresh the map a total of 3 times.	Polychrome 15 Senior Investigator Log 4 Denny 15000
Clear Battlefront Purge: Difficulty VI and accumulate a total of 8000 Gear Coins in a single session.	Polychrome 15 Senior Investigator Log 4 Denny 15000
Clear Battlefront Purge: Difficulty VI and earn 10 [General] Resonia in a single session.	Polychrome 15 Senior Investigator Log 4 Denny 15000
Clear Battlefront Purge: Difficulty VI and obtain 2 Lv. 4 Gear in a single session.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
Clear Battlefront Purge: Difficulty VI at Ether Activity: 6.	Polychrome 15 W-Engine Energy Module 4 Denny 15000
Clear Battlefront Purge: Difficulty VI and complete the battle with Geppetto in less than 3 minutes and 30 seconds.	Polychrome 15 Bangboo System Widget 4 Denny 15000

Achievements

There are 9 Achievements in the category Achievements Related to Battlefront Purge:

	Achievement	Description	Requirements	Reward
	Step Beyond "Lost"	Complete the "Battlefront Purge: Difficulty 5" commission in "Lost Void."			5
	Breaking the Strings of Phantoms	Clear "Battlefront Purge: Difficulty V" on Ether Activity 9.		Title: To That Realm of None	20
	Lost Investigation Team	In Battlefront Purge, reach a total level of 72 for Explorer's Badges.		Title: Ace Investigation Team	20
	Unconventional Gold Rush	Clear "Battlefront Purge: Difficulty V" with 6,000 Gear Coins.			5
	The Fastest Route	Complete "Battlefront Purge: Difficulty V" with less than 7 combat areas.			5
	Master Craftsman	Reach Level 4 of any General Gear when clearing "Battlefront Purge: Difficulty V."			5
	Silent Journey	Obtain less than 8 Resonia in "Battlefront Purge: Difficulty V."			5
	Concerto of Ether	Obtain more than 20 Resonia in "Battlefront Purge: Difficulty V."			5
	No Risk of Getting Lost	Clear "Battlefront Purge: Difficulty VI" at "Ether Activity: 12."		Title: Puppet Theater Audience	20

Other Languages

Language	Official Name
English	Battlefront Purge
Chinese (Simplified)	战线肃清
Chinese (Traditional)	戰線肅清
Japanese	戦線掃討
Korean	전선 소탕 Jeonseon Sotang
Spanish	Purga en el frente de batalla
French	Purge au front
Russian	Зачистка фронта Zachistka fronta
Thai	กวาดล้างแนวรบ
Vietnamese	Bình Loạn Chiến Tuyến
German	Frontsäuberung
Indonesian	Pembersihan Garis Depan
Portuguese	Extermínio da Linha de Frente

Change History