About debuffs
Negative effects you can apply to enemies. Each entry below lists every Set 17 source — champions, traits, items, and augments — that inflicts that effect. Click an effect's name for the full breakdown, including what counters it.
See also: Buffs — positive effects you can stack on your own units — and Economy for player-side resource mechanics.
Stun
Disables the target for a duration: no movement, no attacks, no ability casts.
Champions (4)
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Shield of Daybreak ability
Shield of Daybreak Gain Shield for 4 seconds. Bash the current target, dealing 100 / 150 / 225 magic damage and stunning them for 1.75 / 1.75 / 2 seconds.
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Counter Star-ike ability
Counter Star-ike Enter a defensive stance for 3 seconds, reducing incoming damage by 20 / 25 / 30 and gaining 400 / 450 / 500 Shield. When the stance ends, strike all nearby enemies, dealing magic damage and Stunning them for 1 / 1.25 / 1.5 second(s). -
Grasp of Convergence ability
Grasp of Convergence Passive: Gain 50% more max Health from all sources. Active: Converge an X-shape of vines on the target, dealing magic damage to each enemy hit and Stunning them for 1.5 / 1.5 / 1.75 seconds. N.O.V.A. Strike: Send forth a wave of dragons that stun all enemies for 1.5 / 1.5 / 1.75 seconds. For the rest of combat, Maokai's attacks deal bonus physical damage.
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Psionic Crush ability
Psionic Crush Hurl a chunk of magnetic debris at the nearest target without one, dealing 300 / 450 / 999 magic damage and sticking it to them. If an enemy with debris dies, it passes to the nearest enemy without one. Every 5 casts, instead rip off all debris dealing 120 / 180 / 999 magic damage, then crush all the debris onto the target, dealing 720 / 1100 / 9999 magic damage and briefly stunning them.
Artifacts (3)
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- +200 HP
- +20 Armor
Eternal Winter description
Enemies who damage the holder are 20% Chilled for 1.5 seconds. After 7 Chills from this item, the attacker is Stunned instead (Cooldown: 15 seconds). [Unique - only 1 per champion] Chill: reduce Attack Speed Stun: cannot move, attack, or cast Abilities
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- +80 Armor
- +80 MR
- +140% AD
Silvermere Dawn description
Grants immunity to Stuns and the holder's attacks Stun the target for 0.8 seconds. The holder's Attack Speed is locked at 0.5.
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- +500 HP
- +20 Armor
- +20 MR
The Indomitable description
The holder's Move Speed is drastically reduced. Gain 15% max Health, stun immunity, and pull the current target into melee range.
Anima items (2)
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- +550 HP
- +30 Armor
- +30 MR
Deep Freeze description
The first time you fall below 90%, 60%, 40%, and 20% health, gain a 20% max health shield for 4 seconds. When this happens, release a frost nova that stuns enemies within 2 hexes for 2 seconds and deals magic damage equal to 15% of their max Health. The radius increases by 1 each nova. Recommended Roles: Attack or Magic Tank
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- +250 HP
- +30 Armor
- +30 MR
Iceblast Armor description
The first time you fall below 70% and 35% health, gain a 25% max health shield for 4 seconds and release a frost nova that stuns enemies within 3 hexes for 2 seconds. Recommended Roles: Attack or Magic Tank
Graves items (1)
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Shockwave description
Combat Start: Unleash a shockwave forward that deals 15% of Graves' max Health as magic damage and stun enemies hit for 2 seconds.
Augments (2)
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Arcane Viktor-y Gold Description
After 8 seconds of combat, stun the enemy team for 1.5 seconds. Repeat this after 18 seconds of combat. TFT Macao Open, 2024
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Shieldmaiden Silver Description
Gain a Leona. Your strongest Leona becomes an Attack Fighter that dashes through enemies to deal physical damage, stunning the first target hit.
Slow
Reduces the target's attack speed for a duration. Patch 17.1 renamed this keyword from "Chill"; it does not affect movement speed.
Champions (2)
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Chemical Rage ability
Chemical Rage Heal over 2 seconds. Then, deal magic damage to target and enemies adjacent to them and 30% Chill them for 2 seconds.
- Slow
- Slow: Reduce Attack Speed
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Reality Tear ability
Reality Tear Passive: On cast, attacks gain stacking bonus magic damage. Starting from the third cast, gain true damage instead. Active: Gain 200 / 250 / 3456 Shield for 3 seconds, then slice open a rift on the largest group of champions dealing the Passive's bonus damage to all enemies within. Enemies have their Attack Speed slowed by 50 / 50 / 99% while allies within gain 80 / 80 / 999% Attack Speed, both rapidly decaying over 3 seconds. Shen always gains his rift's full bonus for this duration.
Artifacts (1)
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- +65% AS
Mittens description
Shrinks the holder, granting them increased movement speed and immunity to Slow, Burn, and Wound.
Knock Up
Briefly lifts the target into the air, interrupting their action. Set-17 sources include the Fizz and Rhaast carries, the frontliners Blitzcrank, Rek'Sai, Aatrox, Meepsie, and Nunu, and Samira herself — both via her active ("Jump and Jive") and the passive that triggers off any ally-applied knock-up.
Champions (8)
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Stellar Slash ability
Stellar Slash Heal 325 / 400 / 650 , then deal 80 / 120 / 180 physical damage to the current target. N.O.V.A. Strike: Cleave the battlefield, briefly knocking up all enemies and dealing physical damage.
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Upheaval ability
Upheaval Heal , then briefly knock up adjacent enemies and deal 80 / 120 / 180 magic damage. -
Meep Impact ability
Meep Impact Heal Health over 3 seconds. Slam the target, dealing 160 / 240 / 360 magic damage and knocking up for 1.5 / 1.75 / 2 seconds. The impact creates meepwaves that deal 50% of these effects in the target's row. Meep Bonus: Meeps water Meepsie's flower, increasing all incoming Healing and Shielding by ? .
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Meep Bait ability
Meep Bait Dash through the current target, dealing magic damage. Every third cast also summons a Mega Meep after a delay, briefly knocking the target up and dealing magic damage. Adjacent enemies take 50% damage. Meep Bonus: Add ? Meep to the bait, increasing Mega Meep damage by . -
Divine Scythe ability
Divine Scythe Gain 20% Durability for 2 seconds, healing over the duration. Afterwards, slash forward in a line, dealing 120 / 180 / 300 physical damage to enemies hit and knocking them up for 1 second. -
Jump and Jive ability
Jump and Jive Passive: Whenever an enemy is knocked up, shoot them, dealing physical damage and entering The Groove for 3 seconds. Active: Unleash a volley of bullets at the target, dealing 375 / 560 / 900 physical damage and knocking up for 1 seconds. -
Calamity ability
Calamity Gain 475 / 575 / 2000 Shield for 4 seconds. Summon an astrolabe to crash down on a nearby hex, dealing 120 / 180 / 2000 magic damage to enemies within 2 hexes. Then, push the astrolabe towards the end of the board, dealing 100 / 150 / 2000 magic damage. All enemies hit by the astrolabe are knocked up for 1.5 / 1.75 / 8 seconds.
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Party Crasher ability
Party Crasher Passive: Every 2 / 2 / 0.5 seconds, call down a bolt on the highest Health nearby enemy that deals 60 / 90 / 150 magic damage. Active: Summon a disco ball at the largest clump of enemies, then knock up the current target into it, dealing 150 / 225 / 999 magic damage. They crash down into the disco ball, dealing 175 / 265 / 5000 magic damage in a three hex radius. Enter The Groove for 1 second per enemy hit.
Shred
Reduces the target's Magic Resist (commonly by 30%, though the amount varies by source) for a duration, or for the rest of combat with some effects.
Traits (1)
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Description
Aatrox: Ally Damage 30% Shred and Sunders enemies Caitlyn: Grant allies 20% Attack Speed Akali: Allies gain Precision Maokai: Allies heal 12% max Health Kindred: Shield the strongest Tank for 800 Emblem: Allies deal 10% stacking bonus true damage
Completed items (2)
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- +250 HP
- +35 MR
- +15 AP
Ionic Spark description
30% Shred enemies within 2 hexes. When enemies cast an Ability, deal magic damage equal to 150% of the Mana spent Shred: Reduce Magic Resist
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- +15% AS
- +35 AP
- +1 Mana Regen
Void Staff description
Damage from attacks and Abilities 30% Shred the target for 5 seconds. This effect does not stack. Shred: Reduce Magic Resist
Radiant items (2)
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- +500 HP
- +70 MR
- +30 AP
Radiant Ionic Spark description
30% Shred enemies within 2 hexes. When enemies cast an Ability, deal magic damage equal to 300% of the Mana spent. [Direct damage item] Shred: Reduce Magic Resist
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- +30% AS
- +75 AP
- +2 Mana Regen
Radiant Void Staff description
Damage from attacks and Abilities 30% Shred the target for the rest of combat. This effect does not stack. Shred: Reduce Magic Resist
Artifacts (1)
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- +60 AP
- +2 Mana Regen
Blighting Jewel description
Dealing magic damage reduces the target's Magic Resist by 6. If their Magic Resist is 0, grant the holder 2 Mana instead. Ability damage can only trigger on each enemy once every 0.5 seconds.
Anima items (2)
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- +15 Armor
- +15 MR
- +20% AD
- +20 AP
Cyclonic Slicers description
Gain 3 orbiting razors. Razors deal ? magic damage, and 30% Shred and Sunder enemies for 4 seconds. Deal 10% increased damage to Shredded or Sundered enemies. Damage increases based on Stage. Recommended Roles: Attack or Magic Fighter
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- +40 Armor
- +40 MR
- +30% AD
- +30 AP
Unceasing Cyclone description
Gain 6 orbiting razors. Razors deal ? true damage, and 30% Shred and Sunder enemies for the rest of combat. Deal 30% increased damage to Shredded or Sundered enemies. Damage increases based on Stage. Recommended Roles: Attack or Magic Fighter
Psionic items (2)
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- +15% AS
- +10% Omnivamp
Malware Matrix description
Attack Champion: Dealing physical damage to an enemy reduces the target's Armor by 2. Magic Champion: Dealing magic damage to an enemy reduces the target's Magic Resist by 2. Recommended users: Master Yi and Pyke. Ability Damage Cooldown: 0.75 seconds.
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- +15% AS
- +10% Omnivamp
Malware Matrix description
Attack Champion: Dealing physical damage to an enemy reduces the target's Armor by 2. Magic Champion: Dealing magic damage to an enemy reduces the target's Magic Resist by 2. At (4): If the holder is Psionic, every 3rd attack cleaves, dealing 75 physical damage to nearby enemies. Recommended users: Master Yi and Pyke. Ability Damage Cooldown: 0.75 seconds.
Graves items (2)
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Ripper Bullets description
Attacks reduce enemy Armor and Magic Resistance by 1.
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Ripper Bullets+ description
Attacks reduce enemy Armor and Magic Resistance by 2.
Sunder
Reduces the target's Armor for a duration.
Traits (1)
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Description
Aatrox: Ally Damage 30% Shred and Sunders enemies Caitlyn: Grant allies 20% Attack Speed Akali: Allies gain Precision Maokai: Allies heal 12% max Health Kindred: Shield the strongest Tank for 800 Emblem: Allies deal 10% stacking bonus true damage
Completed items (2)
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- +250 HP
- +20 MR
Evenshroud description
30% Sunder enemies within 2 hexes. Gain 15 Armor and Magic Resist for the first 15 seconds of combat. Sunder: Reduce Armor
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- +15% AD
- +20% AS
- +20% Crit
Last Whisper description
Damage from attacks and Abilities 30% Sunder the target for 3 seconds. This effect does not stack. Sunder: Reduce Armor
Radiant items (2)
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- +500 HP
- +40 MR
Radiant Evenshroud description
30% Sunder enemies within 3 hexes. Gain 50 Armor and Magic Resist for the first 20 seconds of combat. Sunder: Reduce Armor
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- +45% AD
- +40% AS
- +40% Crit
Radiant Last Whisper description
Damage from attacks and Abilities 30% Sunder the target for the rest of combat. This effect does not stack. Sunder: Reduce Armor
Anima items (2)
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- +15 Armor
- +15 MR
- +20% AD
- +20 AP
Cyclonic Slicers description
Gain 3 orbiting razors. Razors deal ? magic damage, and 30% Shred and Sunder enemies for 4 seconds. Deal 10% increased damage to Shredded or Sundered enemies. Damage increases based on Stage. Recommended Roles: Attack or Magic Fighter
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- +40 Armor
- +40 MR
- +30% AD
- +30 AP
Unceasing Cyclone description
Gain 6 orbiting razors. Razors deal ? true damage, and 30% Shred and Sunder enemies for the rest of combat. Deal 30% increased damage to Shredded or Sundered enemies. Damage increases based on Stage. Recommended Roles: Attack or Magic Fighter
Psionic items (2)
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- +15% AS
- +10% Omnivamp
Malware Matrix description
Attack Champion: Dealing physical damage to an enemy reduces the target's Armor by 2. Magic Champion: Dealing magic damage to an enemy reduces the target's Magic Resist by 2. Recommended users: Master Yi and Pyke. Ability Damage Cooldown: 0.75 seconds.
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- +15% AS
- +10% Omnivamp
Malware Matrix description
Attack Champion: Dealing physical damage to an enemy reduces the target's Armor by 2. Magic Champion: Dealing magic damage to an enemy reduces the target's Magic Resist by 2. At (4): If the holder is Psionic, every 3rd attack cleaves, dealing 75 physical damage to nearby enemies. Recommended users: Master Yi and Pyke. Ability Damage Cooldown: 0.75 seconds.
Graves items (3)
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Meltthrough description
Every second, reduce the Armor of enemies within 2-hexes by 4, doubled for adjacent enemies.
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Ripper Bullets description
Attacks reduce enemy Armor and Magic Resistance by 1.
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Ripper Bullets+ description
Attacks reduce enemy Armor and Magic Resistance by 2.
Wound
Reduces healing the target receives by 33% for a duration.
Champions (1)
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Star Strike ability
Star Strike Reposition next to the target to strike the most enemies. Then throw 5 piercing kunai, each dealing 43 / 65 / 97 physical damage to the first enemy hit, reduced to for each subsequent target. Kunai remove 1 Armor, 2 if they crit. N.O.V.A. Strike: Slice all enemies, applying Wound and a bleed that deals physical damage each second. Kunai increase the damage of the bleed by 12%.
Completed items (3)
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- +150 HP
- +20 AP
- +1 Mana Regen
Morellonomicon description
Attacks and Abilities deal 1% Burn and 33% Wound to enemies for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +45% AS
Red Buff description
Attacks and Abilities 1% Burn and 33% Wound enemies for 5 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +150 HP
- +20 Armor
Sunfire Cape description
Gain 8% max Health. Every 2 seconds, deal 1% Burn and 33% Wound to an enemy within 2 hexes for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
Radiant items (3)
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- +300 HP
- +35 AP
- +2 Mana Regen
Radiant Morellonomicon description
Attacks and Abilities deal 2% Burn and 33% Wound to enemies for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +80% AS
Radiant Red Buff description
Attacks and Abilities 2% Burn and 33% Wound enemies for 5 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +300 HP
- +40 Armor
Radiant Sunfire Cape description
Gain 16% max Health. Every 2 seconds, deal 2% Burn and 33% Wound to an enemy within 2 hexes for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: reduces healing received
Artifacts (1)
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- +65% AS
Mittens description
Shrinks the holder, granting them increased movement speed and immunity to Slow, Burn, and Wound.
Anima items (2)
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- +40% AD
- +45 AP
- +5 Mana Regen
Evolved Embershot description
For every 15 mana spent, fire a projectile at a nearby enemy dealing ? + 50% of the holder's Ability Power magic damage, and applying 1% Burn and 33% Wound to enemies for 10 seconds. Each projectile leaves a lingering field that deals ? magic damage to enemies each second. Damage increases based on Stage. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received Recommended Roles: Magic Caster
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- +15% AD
- +45 AP
- +4 Mana Regen
Searing Shortbow description
For every 20 mana spent, fire a projectile at a nearby enemy, dealing ? + 75% of the holder's Ability Power magic damage and applying 1% Burn and 33% Wound to enemies for 3 seconds. Damage increases based on Stage. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received Recommended Role: Magic Caster
Burn
Deals a percent of the target's maximum Health as true damage every second. Most burn sources also apply Wound, which reduces healing received — together they form the standard answer to high-Health frontlines. Standard craftable burn items in Set 17: Morellonomicon (on hit), Red Buff (on hit), and Sunfire Cape (passive AoE every 2s). Searing Shortbow (per 20 mana spent) is a trait-exclusive Anima Weapon (from the Anima trait), not a craftable.
Completed items (3)
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- +150 HP
- +20 AP
- +1 Mana Regen
Morellonomicon description
Attacks and Abilities deal 1% Burn and 33% Wound to enemies for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +45% AS
Red Buff description
Attacks and Abilities 1% Burn and 33% Wound enemies for 5 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +150 HP
- +20 Armor
Sunfire Cape description
Gain 8% max Health. Every 2 seconds, deal 1% Burn and 33% Wound to an enemy within 2 hexes for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
Radiant items (3)
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- +300 HP
- +35 AP
- +2 Mana Regen
Radiant Morellonomicon description
Attacks and Abilities deal 2% Burn and 33% Wound to enemies for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +80% AS
Radiant Red Buff description
Attacks and Abilities 2% Burn and 33% Wound enemies for 5 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received
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- +300 HP
- +40 Armor
Radiant Sunfire Cape description
Gain 16% max Health. Every 2 seconds, deal 2% Burn and 33% Wound to an enemy within 2 hexes for 10 seconds. Burn: Deals a percent of the target's max Health as true damage every second Wound: reduces healing received
Artifacts (1)
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- +65% AS
Mittens description
Shrinks the holder, granting them increased movement speed and immunity to Slow, Burn, and Wound.
Anima items (2)
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- +40% AD
- +45 AP
- +5 Mana Regen
Evolved Embershot description
For every 15 mana spent, fire a projectile at a nearby enemy dealing ? + 50% of the holder's Ability Power magic damage, and applying 1% Burn and 33% Wound to enemies for 10 seconds. Each projectile leaves a lingering field that deals ? magic damage to enemies each second. Damage increases based on Stage. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received Recommended Roles: Magic Caster
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- +15% AD
- +45 AP
- +4 Mana Regen
Searing Shortbow description
For every 20 mana spent, fire a projectile at a nearby enemy, dealing ? + 75% of the holder's Ability Power magic damage and applying 1% Burn and 33% Wound to enemies for 3 seconds. Damage increases based on Stage. Burn: Deals a percent of the target's max Health as true damage every second Wound: Reduces healing received Recommended Role: Magic Caster
Bleed
Damage dealt over multiple seconds as flat physical or magic damage, AD- or AP-scaled. Distinct from Burn (% max-Health true damage). Set-17 sources include Talon's stab, Akali's bleed (N.O.V.A. capstone), the Stargazer Serpent constellation, and Teemo's stacking magic poison.
Champions (3)
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Diviner's Judgment ability
Diviner's Judgment Stab the target, causing them to bleed for 460 / 690 / 1135 physical damage over 18 seconds. After the attack, leap to the highest percent Health enemy within 3 hexes. -
Double Time ability
Double Time Passive: Attacks deal 30 / 45 / 100 bonus magic damage and an additional 70 / 105 / 190 stacking magic damage over 6 seconds. While an enemy has 5 or more stacks, Teemo is in The Groove. Active: Gain 150% Attack Speed for 3 attacks.
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Star Strike ability
Star Strike Reposition next to the target to strike the most enemies. Then throw 5 piercing kunai, each dealing 43 / 65 / 97 physical damage to the first enemy hit, reduced to for each subsequent target. Kunai remove 1 Armor, 2 if they crit. N.O.V.A. Strike: Slice all enemies, applying Wound and a bleed that deals physical damage each second. Kunai increase the damage of the bleed by 12%.
Traits (1)
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Description
Stargazers chart a different constellation every game. This game: The Serpent. Allies in empowered hexes gain 5% Durability. Stargazers in empowered hexes gain more and poison enemies, repeating a portion of damage dealt as magic damage over 3 seconds. More hexes reveal at each player level