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This article explains the mechanics of debuffs (i.e. negative effects) in Arknights.

Attributes

There are two types of attribute debuffs: multiplier and direct.

Multiplier

Multiplier debuffs reduce the corresponding value by a set percentage which stacks multiplicatively with each other, calculated by the following formula:

Where:

  • a represents the final multiplier debuff.
  • x represents the value of each multiplier debuff.
  • n represents the scaling multiplier debuff's count (1st, 2nd, etc.).

The following are sources of multiplier debuffs:

Operator Source Range/Target Value
Skill-Chiave2.png
Blazing Wire Stripper
Lasts 5 ~ 8 seconds
    
  
  
    
  • L1-L7: 10% RES
  • M1: 13% RES
  • M2: 16% RES
  • M3: 20% RES
Skill-Elysium1.png
Monitor
  
  
  • L1-L3: 20% DEF
  • L4-L6: 22% DEF
  • L7: 25% DEF
  • M1: 28% DEF
  • M2: 31% DEF
  • M3: 35% DEF
Skill-Eyjafjalla2.png
Ignition
On attack once charged (primary target only), lasts 6 seconds
  • L1-L3: 10% RES
  • L4-L6: 15% RES
  • L7-M2: 20% RES
  • M3: 25% RES
Black Mist (talent) On attack, lasts 1 second 10%/20% (+3%) RES
Spiritual Dissolution (talent) Within attack range 15%/27%/40% (+4%) RES
Skill-Leonhardt1.png
Deconstruct and Detonate
Lasts 6 seconds
  
  
  
  • L1-L3: 5% RES
  • L4-L6: 8% RES
  • L7: 12% RES
  • M1: 13% RES
  • M2: 14% RES
  • M3: 15% RES
Skill-Meteor1.png
Armor Breaker
On attack once charged, lasts 5 seconds
  • L1-L3: 20% DEF
  • L4-L6: 25% DEF
  • L7: 30% DEF
  • M1: 31% DEF
  • M2: 32% DEF
  • M3: 35% DEF
Skill-Meteor2.png
Armor Breaker - Spread
Up to 5 enemies within attack range, lasts 5 seconds
  • L1-L3: 25% DEF
  • L4-L6: 30% DEF
  • L7-M2: 35% DEF
  • M3: 40% DEF
Skill-Pramanix2.png
Natural Deterrent
Within attack range
  • L1-L3: 35% DEF and 20% RES
  • L4-L6: 40% DEF and 23% RES
  • L7: 45% DEF and 26% RES
  • M1: 50% DEF and 26% RES
  • M2: 55% DEF and 26% RES
  • M3: 60% DEF and 30% RES
Skill-Shamare2.png
Cursed Doll
Cursed Doll
  
  
  
  • L1-L3: 20% DEF
  • L4-L6: 25% DEF
  • L7: 30% DEF
  • M1: 40% DEF
  • M2: 45% DEF
  • M3: 50% DEF

For example, the interaction of Meteor's Skill-Meteor1.png Armor Breaker and Pramanix's Skill-Pramanix2.png Natural Deterrent would be calculated by the following method, assuming that both is at Level 7 (to simplify the calculation, the percentages are converted into decimals):

As the result, an enemy affected by both Armor Breaker and Natural Deterrent at Level 7 will have their DEF reduced by 61.5%, rounded up to 62%.

Direct

Direct debuffs reduce the corresponding attribute by a fixed amount that is subtracted directly from the original values before the multiplier debuff(s) are applied.

The following are sources of direct debuffs:

Operator Source Range/Target Value
Skill-Holungday2.png
"Night of Violet"
Creates a goo that covers the attack range for 5 seconds in each attack
  • L1-L3: 50 DEF
  • L4-L6: 100 DEF
  • L7-M1: 150 DEF
  • M2-M3: 170 DEF
Skill-Holungday3.png
"Holiday Storm"
Creates a goo that covers the attack range for 5 seconds in each attack
    
   
  
   
    
  • L1-L3: 100 DEF
  • L4-L6: 150 DEF
  • L7: 200 DEF
  • M1-M3: 220 DEF
Skill-Ifrit2.png
Pyroclasm
On attack, lasts 3 seconds
  • L1-L6: 100 DEF
  • L7-M2: 200 DEF
  • M3: 300 DEF
Skill-Ifrit3.png
Scorched Earth
Within attack range
  • L1-L6: 7 RES
  • L7: 10 RES
  • M1: 13 RES
  • M2: 16 RES
  • M3: 20 RES
Skill-Meteorite2.png
High-Explosive Shell
Within attack range (AoE), lasts 10 seconds
  • L1-L3: 130 DEF
  • L4-L6: 170 DEF
  • L7: 210 DEF
  • M1: 250 DEF
  • M2: 290 DEF
  • M3: 330 DEF
Skill-Rosmontis3.png
"As You Wish"
Enemies blocked by the Tactical Equipments 160 DEF
  • When Corrosion Damage procs, the victim will have their DEF permanently reduced by 100 which can stack without a limit.

Amplification

Amplifications, as its name suggests, increases the corresponding type of damage taken by a set percentage which stacks multiplicatively with each other, calculated by the following formula:

Where:

  • a represents the final amplification.
  • x represents the value of each amplification.
  • n represents the amplification's count (1st, 2nd, etc.).

The following are sources of amplifications:

Operator Source Range/Target Value
Skill-Carnelian3.png
Mark of Gluttony
Enemies hit by Carnelian's attacks while active 20%, can stack additively to 100%
Skill-Saria3.png
Calcification
      
    
  
  
    
      
  • L1-L3: 20% Arts
  • L4-L6: 30% Arts
  • L7: 40% Arts
  • M1: 45% Arts
  • M2: 50% Arts
  • M3: 55% Arts
Vulnerability Deconstruction (talent) All blocked enemies (only while Sesa is deployed) 7%/15% (+2%) Physical
Arts Sniper (talent) All blocked enemies (only while Skyfire is deployed) 7%/15% (+3%) Arts
Insult to Injury (talent) Stunned enemies within attack range 18% (+3%) Physical
  • Interference Mines apply a 50% damage amplification to all damage types on enemies caught in its detonation.

For example, the interaction between Saria's Skill-Saria3.png Calcification and Skyfire's Arts Sniper would be calculated by the following method, assuming that the former is at Level 7 and the latter is the Elite 2 version (to simplify the calculation, the percentages are converted into decimals):

As the result, an enemy affected by both Level 7 Calcification and Elite 2 Arts Sniper will take 61% more Arts damage.

Fragile

Other debuffs

Debuff Effect
Bind (Enemies only) Cannot move.
Burning Breath Takes Pure damage every second, which increases on every subsequent instance up to a limit. Can be resisted through Status Resistance.
Silence (Enemies only) Disables the use of abilities, with certain exceptions.
Sleep (Enemies only) Cannot act but are invulnerable.
Slow (Enemies only) Speed reduced by 80%.
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