Hephaestus (Memorial Arena)
Last updated 2025-08-07
This article is about the Memorial Arena boss. For the Archive entry, see Hephaestus.
Type
Mecha
Boss Description
After the Battle of Schicksal, Tesla developed a general-purpose prototype defense mech with all-new tech. It can carry stuff, respond to emergencies, and double as a security bot. Though she was made prisoner by Schicksal for a while, Tesla managed to escape and even steal plenty of secrets.
Recommended Features
Advantaged Features
Freeze
Disadvantaged Features
Fire DMG
Lightning DMG
Same as before .
Hephaestus is one of the possible bosses in Memorial Arena.
Boss Attributes
Skill descriptions are shared across all Memorial Arena brackets. But the exact boss stats are (vastly) different across brackets.
C Rank
- Conductive ARMs: Attacks inflict Paralyze Trauma. When the gauge fully charges, the Valkyrie will be Paralyzed.
- Combustive ARMs: During Burst, ATKs will also inflict Burn DMG on the Valkyries. Switch character to cancel the continuous DMG.
- Burst Charge: The energy bar charges with time. Hephaestus enters Burst mode when the bar is fully charged and acquires several new attack moves.
B Rank
- Conductive ARMs: Attacks inflict Paralyze Trauma. When the gauge fully charges, the Valkyrie will be Paralyzed.
- Combustive ARMs: During Burst, ATKs will also inflict Burn DMG on the Valkyries. Switch character to cancel the continuous DMG.
- PSY Disruptor: Releases a destructible disruptor. Characters cannot be switched in the AoE.
ELFs will prioritize attacking disruptors. - Burst Charge: The energy bar charges with time. Hephaestus enters Burst mode when the bar is fully charged and acquires several new attack moves.
A~SS Rank
- Conductive ARMs: Attacks inflict Paralyze Trauma. When the gauge fully charges, the Valkyrie will be Paralyzed.
- Combustive ARMs: During Burst, ATKs will also inflict Burn DMG on the Valkyries. Switch character to cancel the continuous DMG.
- PSY Disruptor: Releases a destructible disruptor. Characters cannot be switched in the AoE.
ELFs will prioritize attacking disruptors. - Burst Charge: The energy bar charges with time. Hephaestus enters Burst mode when the bar is fully charged and acquires several new attack moves.
- Reactive Field: Enter defensive stance when expanding the Reactive Field. Being attacked in this mode makes the Burst meter increase faster.
SSS Rank
- Pyro Enhancement: Hephaestus is enhanced because of its surrounding temperature.
Tip: Inflict Rime Trauma to quickly lower the surrounding temperature. - Lava Spray: Hephaestus continuously spews lava forward from its barrel. The lava creates a lava trap that lasts for a short duration after it lands on the ground.
- Lava Bomb: Hephaestus throws an oil bottle towards Valkyries. After the oil bottle explodes, it creates a lava trap based on the surrounding temperature.
- Infernal Domain: When Hephaestus' HP drowsdrows below 70%, it shoots an oil bottle into the air. Afterwards, it throws the bottle to trigger an explosion that deals DMG. When the skill ends, it channels energy into the ground to form a lava fissure that continuously spreads pillow lava.
Tip: Inflict Rime Trauma or break all newly thrown oil bottles to quickly lower the surrounding temperature. - Upward Slash: Charges forward. If it hits a Valkyrie, it triggers a Throw attack that knocks the Valkyrie in the air and deals a multi-slash attack.
- Combustive ARMs: During Burst, ATKs will also inflict Burn DMG on the Valkyries. Switch character to cancel the continuous DMG.
- Burst Charge: The energy bar charges with time. Hephaestus enters Burst mode when the bar is fully charged and acquires several new attack moves.
Possible Status Ailments
Trivia
- Freeze advantage, Fire DMG disadvantage, and Lightning DMG disadvantage only apply at SSS Rank.
- Hephaestus cannot be Time-Slowed.