Effect RES
Last updated 2026-09-09
Effect RES is one of the stats in Honkai: Star Rail, used by both characters and enemies. It decreases the probability of an attack inflicting a debuff on a target, alongside Debuff RES.
Enemy Effect RES
Different enemies have varying amounts of Base Effect RES. Additionally, enemies' Effect RES will increase by 0.4% per level from Level 51 to Level 75, up to 10%.
Level 120 enemies in Anomaly Arbitration have 10% additionally increased Effect RES.
Abilities
2 abilities increase Effect RES of characters:
| Character | Name | Description | Type | Tag |
|---|---|---|---|---|
 Firefly |
The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 20%—44%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 10%—34%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit. |
Talent | Defense | |
 Aventurine |
For any single ally with Fortified Wager, their Effect RES increases by 25%—55%, and when they get attacked, Aventurine gains 1 point of Blind Bet. When Aventurine has Fortified Wager, he can resist Crowd Control debuffs. This effect can trigger again after 2 turn(s). Aventurine additionally gains 1 point(s) of Blind Bet after getting attacked. Upon reaching 7 points of Blind Bet, Aventurine consumes the 7 points to launch a 7-hit Follow-up ATK, with each hit dealing Imaginary DMG equal to 12.5%—27.5% of Aventurine's DEF to a single random enemy. Blind Bet is capped at 10 points. | Talent | Bounce |
Bonus Abilities
4 Bonus Abilities increase Effect RES of characters:
| Character | Name | Description | Ascension Requirement |
|---|---|---|---|
 Jingliu |
While in the Spectral Transmigration state, increases Effect RES by 35%. | 2 | |
| Jingliu |
While in the "Spectral Transmigration" state, Effect RES increases by 35%, and Ultimate DMG dealt increases by 20%. | 2 | |
 Yanqing |
When Soulsteel Sync is active, Effect RES increases by 20%. | 4 | |
 Hyacine |
Increases Hyacine's Effect RES by 50%. When using Skill and Ultimate, dispels 1 debuff(s) from all ally targets. | 4 |
1 Bonus Abilities reduces Effect RES of enemies:
| Character | Name | Description | Ascension Requirement |
|---|---|---|---|
 Dr. Ratio |
When Skill is used to attack an enemy target, there is a 100% base chance to reduce the attacked enemy target's Effect RES by 10% for 2 turn(s). | 4 |
Eidolons
7 Eidolons increase Effect RES of characters:
| Character | Name | Description | Level |
|---|---|---|---|
 Gallagher |
When entering the battle, Gallagher regenerates 20 Energy and increases Effect RES by 50%. | 1 | |
| Gallagher |
When using the Skill, dispels 1 debuff(s) from the designated ally. At the same time, increases their Effect RES by 30% for 2 turn(s). | 2 | |
 Yunli |
After launching "Intuit: Slash" or "Intuit: Cull," increases this unit's Effect RES by 50%, lasting for 1 turn(s). | 4 | |
 Gepard |
When Gepard is in battle, all allies' Effect RES increases by 20%. | 4 | |
 Robin |
When using the Ultimate, dispels Crowd Control debuffs from all allies. While Robin is in the "Concerto" state, increases the Effect RES of all allies by 50%. | 4 | |
| Firefly |
While in Complete Combustion, increases SAM's Effect RES by 50%. | 4 | |
 Lynx |
Additionally boosts the Max HP increasing effect of "Survival Response" by an amount equal to 6% of Lynx's Max HP and increases Effect RES by 30%. | 6 |
3 Eidolons reduce Effect RES of enemies:
| Character | Name | Description | Level |
|---|---|---|---|
 Guinaifen |
When Skill is used, there is a 100% base chance to reduce the attacked target enemy's Effect RES by 10% for 2 turn(s). | 1 | |
 Silver Wolf |
When an enemy enters battle, reduces their Effect RES by 20%. | 2 | |
 Black Swan |
While in the Epiphany state, enemy targets have their Effect RES reduced by 10% and Black Swan regenerates 8 Energy at the start of these targets' turns or when they are defeated. This Energy Regeneration effect can only trigger up to 1 time while Epiphany lasts. The trigger count is reset when Epiphany is applied again. | 4 |
Relic Sets
1 Relic Sets increases Effect RES of characters:
| Icon | Set | Pieces | Bonuses |
|---|---|---|---|
|
Broken Keel |    
|
2 Piece: Increases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%. |
Light Cones
Toggle Columns:
3 Light Cones increase Effect RES of characters:
| Icon & Name | Rarity | Path | Stats | Passive |
|---|---|---|---|---|
 Destiny's Threads Forewoven |
|
 Preservation
|
HP: 43~952 ATK: 16~370 DEF: 21~463 |
Insight Increases the wearer's Effect RES by 12~20%. For every 100 of DEF the wearer has, increases the wearer's DMG dealt by 0.8~1.2%, up to a maximum DMG increase of 32~48%. |
 Perfect Timing |
|
 Abundance
|
HP: 43~952 ATK: 19~423 DEF: 18~396 |
Refraction of Sightline Increases the wearer's Effect RES by 16~32% and increases Outgoing Healing by an amount that is equal to 33~45% of Effect RES. Outgoing Healing can be increased this way by up to 15~27%. |
 Texture of Memories |
|
Preservation
|
HP: 48~1,058 ATK: 19~423 DEF: 24~529 |
Treasure Increases the wearer's Effect RES by 8~16%. If the wearer is attacked and has no Shield, they gain a Shield equal to 16~32% of their Max HP for 2 turn(s). This effect can only be triggered once every 3 turn(s). If the wearer has a Shield when attacked, the DMG they receive decreases by 12~24%. |
Enemies
1 Enemy can reduce the Effect RES of characters:
| Enemy | Tier | Damage | Weakness |
|---|---|---|---|
 Dreamjolt Troupe's Spring Loader
|
Normal | 
|
|
Consumables
There are 5 consumables:
| Name | Effect | Type | Source | Recipe |
|---|---|---|---|---|
 Arma Correctional Body Wash
|
Upon use, increases Effect RES of all allies by 20% for the next battle. | Defense Consumables | Sold by The Arma Correctional Group | |
 Disposable Shield
|
When used, increase DEF of all allies by 15%, and Effect RES by 10% for the next battle. | Defense Consumables | Omni-Synthesizer | Available by default |
 Jade Marrow Diffusion
|
Upon use, increases Effect RES of all allies by 30% for the next battle. | Defense Consumables | Omni-Synthesizer | Sold by The Insides of Mr. Huo's Coat |
 Longevity Pill of Cruelty
|
Upon use, increases Max HP of all allies by 20% and Effect RES by 6% in the next 3 battles. | Defense Consumables | Omni-Synthesizer | Sold by Jeweler's Pagoda |
 The Moment Before Death
|
Upon use, all allies take 20% less DMG and increase their Effect RES by 6% for the next battle. | Defense Consumables | Omni-Synthesizer | Chabro ( Happy)
|
Other Languages
| Language | Official Name |
|---|---|
| English | Effect RES |
| Chinese (Simplified) | 效果抵抗 |
| Chinese (Traditional) | 效果抗性 |
| Japanese | 効果抵抗 |
| Korean | 효과 저항 |
| Spanish | RES a efecto |
| French | RÉS aux effets |
| Russian | Сопротивление эффектам |
| Thai | ต้านทานสถานะ |
| Vietnamese | Kháng Hiệu Ứng |
| German | Effekt-WDS |
| Indonesian | Effect RES |
| Portuguese | RES a Efeito |
Change History
Released in Version 1.0
- Level scaling of Effect RES for enemies was changed:
- Old: Increases by 0.5% per level from Level 51 to Level 100; Maximum 25%.
- New: Increases by 0.4% per level from Level 51 to Level 75; No further increase after Level 75; Maximum 10%.
- Effect RES was released.
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