Kog'Maw

The Mouth of the Abyss · Marksman

View builds

Summoner's Rift ARAM Arena Nexus Blitz URF One for All Swiftplay Ultimate Spellbook

Changes in URF

-15% damage dealt · +5% damage taken

Abilities

PassiveIcathian Surprise

4 seconds after dying, Kogmaw explodes, dealing true damage to surrounding enemies.

QCaustic Spittle7s40

Kog'Maw launches a corrosive projectile which deals magic damage and corrodes the target's armor and magic resist for a short time. Kog'Maw also gains additional attack speed.

WBio-Arcane Barrage17s40

Kog'Maw's attacks gain range and deal a percent of the target's maximum health as magic damage %i:OnHit% On-Hit.

EVoid Ooze12s40/55/70/85/100

Kog'Maw launches a peculiar ooze which damages all enemies it passes through and leaves a trail which slows enemies who stand on it.

RLiving Artillery2/1.5/1s40

Kog'Maw fires an artillery shell at a great distance dealing magic damage (increased significantly on low health enemies) and revealing non-stealthed targets. Additionally, multiple Living Artilleries in a short period of time cause them to cost additional Mana.

Patch history

26.16 · Aug 12, 2026

Stats
Base magic resistance increased to 33 from 30.
Magic resistance growth reduced to 1.1 from 1.3.

26.10 · May 13, 2026

Bio-Arcane Barrage
Bug Fix: Fixed a bug where it wouldn't always trigger Statikk Shiv.

26.9 · Apr 29, 2026

Bio-Arcane Barrage
Bug Fix: Fixed bugs that caused it to not work properly as typical on-hit effects.

25.21 · Oct 22, 2025

Caustic Spittle
Bonus attack speed reduced to 5 to 25% from 10 to 30%.

25.17 · Aug 27, 2025

Caustic Spittle
AP ratio increased to 90% AP from 80% AP.
Bio-Arcane Barrage
AP ratio increased to 1.5% per 100 AP from 1% per 100 AP.
Living Artillery
Minimum AP ratio increased to 35 to 45% AP from 35% AP at all ranks.

35 older patches

25.4

Caustic Spittle
Base damage reduced to 80 to 260 from 90 to 290.
AP ratio increased to 80% AP from 70% AP.

14.24

Living Artillery
Bug Fix: No longer reveals the user if cast while the cursor is near an enemy champion.

14.23

Caustic Spittle
Resistances reduction changed to 16 to 32% from 23 to 31%.
Void Ooze

Base stats

Health635 +99/lvl
Mana325 +40/lvl
Attack Damage61 +3.1/lvl
Attack Speed0.665 +2.65/lvl
Armor24 +4.45/lvl
Magic Resist33 +1.1/lvl
Base Health Regen3.75 +0.55/lvl
Base Mana Regen8.75 +0.7/lvl
Move Speed330
Range500

Ranged · Resource: Mana

Base damage reduced to 70 to 230 from 75 to 255.

AP ratio reduced to 65% AP from 70% AP.

14.14

Icathian Surprise
Bug Fix: Is no longer sometimes unable to issue movement commands after the zombie state has expired.

14.13

Icathian Surprise
Bug Fix: Corpse is no longer sometimes a valid movement collision target.

14.7

Void Ooze
Bug Fix: Tooltip now notes the correct slow amount due to 14.5 changes.

14.5

Icathian Surprise
New Effect: Now gains 10% bonus movement speed upon activation.
Maximum bonus movement speed increased to 50% from 40%.
Caustic Spittle
Cast time changed to basic attack windup time from 0.25 seconds.
Void Ooze
Slow increased to 40 to 60% from 30 to 50%
Living Artillery
AD ratio increased to 75% bonus AD from 65%.

14.2

Bio-Arcane Barrage
New Effect: Now displays an attack range indicator while active.

14.1

Bio-Arcane Barrage
Bug Fix: No longer always cancels an ongoing basic attack windup when the buff ends.

13.18

Icathian Surprise
Bug Fix: Character swap to the exploded Kog'Maw model is no longer partially overriding his champion statistics.
No longer shows as having the maximum amount of attack speed while a corpse.

13.12

Bio-Arcane Barrage
Base damage reduced to 3 to 6% of target's maximum health from 3.5 to 6.5%.
Lion Dance Kog'Maw
Living Artillery
Bug Fix: Restored vertical cast indicator.

13.8

Icathian Surprise
Base damage increased to 140 to 650 from 125 to 550.
New Effect: Now grants ghosting while active.
Caustic Spittle
Cooldown reduced to 7 seconds from 8.
Void Ooze
Mana cost reduced to 40 to 100 from 60 to 100.
Slow changed to 30 to 50% from 20 to 52%.

12.22

Stats
Attack damage growth reduced to 3.1 from 3.11.

12.12

Icathian Surprise
Bug Fix: Corpse is no longer an obstacle to other units' pathing.

12.11

Bio-Arcane Barrage
Base damage increased to 3.5 to 6.5% of target's maximum health from 3%.
Caustic Spittle
Resistance reduction reduced to 23 to 31% from 25 to 33%.
Bonus attack speed reduced to 10 to 30% from 15 to 35%.
Bio-Arcane Barrage
Base damage reduced to 3% of target's maximum health from 3 to 7%.

12.10

Stats
Base health increased to 635 from 565.
Health growth increased to 99 from 85.
Armor growth increased to 4.45 from 3.25.
Magic resistance growth increased to 1.3 from 0.5.
Icathian Surprise
Bug Fix: No longer triggers his own Immortal Shieldbow passive.

12.9

Icathian Surprise
Bug Fix: Turrets no longer prioritize and target enemies damaged by it.

12.8

Icathian Surprise
Bug Fix: Enemy champions that deal lethal damage to trigger the zombie state are no longer considered to deal damage to the source when the effect ends.

12.2

Icathian Surprise
Bug Fix: Fixed a bug where towers would incorrectly target enemy champions who took damage from it.

11.18

Void Ooze
AP ratio increased to 70% AP from 50% AP.

11.10

General
Updated base textures.
Updated visual effects.
New basic attack missiles and hit effects.
Icathian Surprise
Reduced noise and improved clarity with regards to the size of the explosion.
Caustic Spittle
New hit effects and a new missile to better represent its actual hitbox.
Bio-Arcane Barrage
New effects to make him more representative of the Void.
Void Ooze
New hit effects and a new missile to better represent its actual hitbox.
Living Artillery
New effects that better represent the hitbox.
Reindeer Kog'Maw, Deep Sea Kog'Maw, and Jurassic Kog'Maw
Added new recolors to all VFX.
Lion Dance Kog'Maw
Caustic Spittle
New unique VFX.
Void Ooze
Updated VFX.
Living Artillery
Updated VFX.
Pug'Maw Kog'Maw
All VFX updated.

11.9

Icathian Surprise
Bug Fix: VO has been restored and is playing once again on all skins.
Caustic Spittle
Resistance reduction increased to 25 to 33% from 20 to 28%.
Void Ooze
Mana cost reduced to 60 to 100 from 80 to 120.

11.5

Bio-Arcane Barrage
Bonus magic damage health ratio increased to 3 to 7% of target's maximum health from 3 to 6%.
Undocumented / Removed: Empowered attacks no longer grant Mana Charge stacks (Tear of the Goddess).

11.2

Caustic Spittle
Bug Fix: No longer permanently loses bonus attack speed after dying.

10.18

Stats
Health growth reduced to 85 from 90.
Armor growth reduced to 3.25 from 3.5.

10.15

Arcanist Kog'Maw
Void Ooze
Bug Fix: VFX now aligns with when it actually deals damage to the enemy units.

10.13

Caustic Spittle
AP ratio increased to 70% AP from 50% AP.
Living Artillery
AP ratio increased to 35% AP from 25% AP.

10.12

Caustic Spittle
Bug Fix: Tooltip no longer mentions rooting for 0.5 seconds.

10.11

Stats
Base health increased to 565 from 534.
Health growth increased to 90 from 88.

10.1

Living Artillery
New Effect: Mana debuff duration now displays on the icon's border.

9.21

Stats
Base mana increased to 325 from 322.2.
Base mana regeneration increased to 8.75 from 8.676.
Caustic Spittle
Base damage increased to 90 to 290 from 80 to 280.
Void Ooze
Base damage increased to 75 to 255 from 60 to 240.

9.8

Battlecast Kog'Maw
Bug Fix: Fixed a bug where Blinding Dart did not correctly display on this skin.

9.1

Living Artillery
New Effect: Can now ping the time until stacks expire if Kog'Maw is unable to cast Living Artillery due to having too many stacks.

8.24

Pug'Maw Kog'Maw
Void Ooze
Bug Fix: Restored self and ally view bubble VFX and enemy view bubbles are now more red.

8.19

Stats
Base movement speed increased to 330 from 325.
Living Artillery
Target range increased to 1300 from 1200.