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Kog'Maw

the Mouth of the Abyss

BClassic SRADCMidMarksman · Mage
Patch 26.19 · updated 2026-09-23

Quick build

On-Hit Carry

Full build
ADCClassic SR21/9/0 masteries
Max
FlashHeal

First buy

  1. Doran's Blade

The default.

Core

  • Blade of the Ruined King
  • Berserker's Greaves
  • Infinity Edge

Loadout

ADC · AD Standard · 21/9/0 masteries

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Overview

Difficulty
Difficulty 6 of 10
Class
Marksman, Mage
Released
· later addition

Base stats

Health
524+84
HP regen
1.11+0.11
Mana
295+40
Mana regen
1.64+0.14
Attack
49+3
Armor
17.5+3.5
MR
30
Move speed
330
Range
500
Attack speed
0.665+2.65%

Abilities

P, Icathian Surprise

Description

Innate: Upon taking fatal damage, Kog'Maw remains active for 4 seconds, losing the ability to use abilities and basic attacks but becoming ghosted, untargetable, and invulnerable, as well as gaining up to 37.5% bonus movement speed over the duration. At the end of the duration, Kog'Maw explodes, dealing 125–550 true damage to all nearby enemies.

Build

Each build as its own page: On-Hit Carry (ADC) · AP Artillery (Mid)

ADCClassic SR
Max
FlashHeal

  1. First buy

    1. Doran's Blade

    The default.

    Alternative start:
    1. Boots of Speed
    2. Health Potion, 4 of them

    Against a lane that can hit you.

    Alternative start:
    1. Long Sword
    2. Health Potion, 2 of them

    Bilgewater Cutlass wants a Long Sword and a Vampiric Scepter; Kog'Maw's first back is already paying for one.

  2. Early

    • Bilgewater Cutlass

    Toward Blade of the Ruined King.

  3. Core

    • Blade of the Ruined King
    • Berserker's Greaves
    • Infinity Edge

  4. Late

    • Phantom Dancer
    • Last Whisper
    • The Bloodthirster

  5. Full build

    • Blade of the Ruined King
    • Berserker's Greaves
    • Infinity Edge
    • Phantom Dancer
    • Last Whisper
    • The Bloodthirster

Runes & masteries

21/9/0 · ADC

AD Standard

Marks
  • 9× +1 Attack Damage
Seals
  • 9× +1 Armor
Glyphs
  • 9× +0.2 Ability Power per level
Quintessences
  • 3× +4.5% Attack Speed

Page total

Ability Power per level
+1.8
Armor
+9
Attack Damage
+9
Attack Speed
+13.5%
Summoner's WrathSummoner's WrathUp to 1 rankImproves the Summoner Spells Exhaust, Ignite, Ghost, Surge, Rally, and PromoteFury (4 of 4 ranks)Fury4 / 4 ranks+1% Attack Speed per rankSorcerySorceryUp to 4 ranks+1% Cooldown Reduction per rankButcherButcherUp to 2 ranksBasic attacks deal 2/4 bonus damage to minions and monsters
Deadliness (4 of 4 ranks)Deadliness4 / 4 ranks+0.166/0.333/0.498/0.664 Attack Damage per levelBlastBlastUp to 4 ranks+0.25/0.5/0.75/1 Ability Power per levelDestructionDestructionUp to 1 rankIncrease damage to turrets by 5%
Havoc (3 of 3 ranks)Havoc3 / 3 ranksIncreases damage dealt by 0.67%/1.33%/2%Weapon Expertise (1 of 1 ranks)Weapon Expertise1 / 1 ranks+8% Armor PenetrationArcane KnowledgeArcane KnowledgeUp to 1 rank+8% Magic Penetration
Lethality (2 of 2 ranks)Lethality2 / 2 ranks+2.5%/5% Critical Strike Damage (5%/10% for melee)Brute Force (2 of 2 ranks)Brute Force2 / 2 ranks+1.5/3 Attack DamageMental ForceMental ForceUp to 3 ranks+2/4/6 Ability PowerSpellswordSpellswordUp to 1 rankDeals 5% of your Ability Power as magic damage on basic attacks
Frenzy (1 of 1 ranks)Frenzy1 / 1 ranksGrants 10% attack speed for 2 seconds after landing a critical hitSunder (3 of 3 ranks)Sunder3 / 3 ranks+2/4/6 LethalityArchmageArchmageUp to 4 ranksIncreases Ability Power by 1.25%/2.5%/3.75%/5%
Executioner (1 of 1 ranks)Executioner1 / 1 ranks · CapstoneIncreases damage dealt by 5% to targets below 50% Health

offense21

Summoner's Resolve (1 of 1 ranks)Summoner's Resolve1 / 1 ranksImproves the Summoner Spells Cleanse, Heal, Smite, Barrier, and FortifyPerseverancePerseveranceUp to 3 ranksGrants up to +2/4/6 Health Regen per 5 seconds based on missing HealthDurability (4 of 4 ranks)Durability4 / 4 ranks+1.5/3/4.5/6 Health per levelTough SkinTough SkinUp to 2 ranksReduces damage taken from monsters by 1/2
Hardiness (3 of 3 ranks)Hardiness3 / 3 ranks+2/4/6 ArmorResistanceResistanceUp to 3 ranks+2/4/6 Magic ResistBladed ArmorBladed ArmorUp to 1 rankDeals 6 damage to any enemy monster that attacks you
UnyieldingUnyieldingUp to 2 ranksReduces damage taken from enemy champions by 1/2RelentlessRelentlessUp to 2 ranksReduces the effectiveness of slows by 7.5%/15%Veteran's Scars (1 of 1 ranks)Veteran's Scars1 / 1 ranks+30 HealthSafeguardSafeguardUp to 1 rankReduces damage taken from turrets by 5%
BlockBlockUp to 1 rankReduces damage taken from champion basic attacks by 3TenaciousTenaciousUp to 3 ranksReduces the duration of crowd control effects by 5%/10%/15%JuggernautJuggernautUp to 3 ranksIncreases your maximum Health by 1.5%/2.75%/4%
DefenderDefenderUp to 1 rankGrants +1 Armor and Magic Resist for each nearby enemy championLegendary ArmorLegendary ArmorUp to 3 ranksIncreases bonus Armor and Magic Resist by +2%/4%/6%Good HandsGood HandsUp to 1 rankReduce time spent dead by 10%Reinforced ArmorReinforced ArmorUp to 1 rankReduce damage taken from critical strikes by 10%
Honor GuardHonor GuardUp to 1 rank · CapstoneReduces damage taken from all sources by 3%

defense9

Summoner's InsightSummoner's InsightUp to 1 rankImproves the Summoner Spells Teleport, Flash, Clarity, Revive, and Clairvoyance.WandererWandererUp to 3 ranksGrants +0.66%/1.33%/2% increased Movement Speed when out of combatMeditationMeditationUp to 3 ranks+1/2/3 Mana Regen per 5 secondsImproved RecallImproved RecallUp to 1 rankReduces the cast time of Recall by 1 second
ScoutScoutUp to 1 rankWards gain 25% increased vision range for the first 3 seconds after placing themMastermindMastermindUp to 3 ranksReduces the cooldown of Summoner Spells by 4%/7%/10%Expanded MindExpanded MindUp to 3 ranks+4/7/10 mana per levelArtificerArtificerUp to 2 ranksReduces the cooldown of activated items by 7.5%/15%
GreedGreedUp to 4 ranksGrants an additional +0.5/1/1.5/2 gold every 10 secondsRunic AffinityRunic AffinityUp to 1 rankIncreases the duration of neutral monster buffs by 20%VampirismVampirismUp to 3 ranks+1%/2%/3% Lifesteal and Spell VampBiscuiteerBiscuiteerUp to 1 rankStart the game with a regenerative biscuit that restores 80 Health and 50 Mana over 10 seconds
WealthWealthUp to 2 ranksIncreases starting gold by 40/75AwarenessAwarenessUp to 4 ranksIncreases Experience earned by 1.25%/2.5%/3.75%/5%Strength of SpiritStrength of SpiritUp to 3 ranksUp to +1/2/3 Health Regen per 5 seconds for each 400 Mana you possessExplorerExplorerUp to 1 rankStart the game with an Explorer's Ward.
PickpocketPickpocketUp to 1 rankGrants 5 gold (melee) or 3 gold (ranged) each time you basic attack an enemy champion (5s cooldown)IntelligenceIntelligenceUp to 3 ranks+2%/4%/6% Cooldown Reduction
NimbleNimbleUp to 1 rank · CapstoneGrants 3% increased Movement Speed

utility0

Skill order

Max order››
Skill order by level for On-Hit Carry
Lv123456789101112131415161718
Q3Q at level 314Q at level 1415Q at level 1517Q at level 1718Q at level 18
W1W at level 14W at level 45W at level 57W at level 79W at level 9
E2E at level 28E at level 810E at level 1012E at level 1213E at level 13
R6R at level 611R at level 1116R at level 16

Matchups

Strong against

  • Cho'GathCho'GathFeastFeastRActive: Cho'Gath attempts to eat the target enemy, dealing them true damage. Against non-champions, the base damage is modified. If the target is killed, Cho'Gath gains a stack of Feast, up to 6 stacks maximum. Loses half stacks on death. Each stack of Feast grants health. stacks are health, and Bio-Arcane BarrageBio-Arcane BarrageWActive: For 8 seconds, Kog'Maw's basic attacks gain bonus range and deal bonus magic damage, capped at 100 against monsters. takes a percentage of it per attack from further away than RuptureRuptureQActive: Cho'Gath ruptures the target location after a 0.625 delay, granting sight of the area before dealing magic damage to enemies within and knocking them up for 1 second, and afterwards slowing them by 60% for 3 seconds. reaches. Every stack Cho'Gath adds makes the matchup worse for him.Full matchup page
  • Dr. MundoDr. MundoSadismSadismRActive: Dr. Mundo regenerates health over 12 seconds and gains bonus movement speed for the duration. restores a percentage and Bio-Arcane BarrageBio-Arcane BarrageWActive: For 8 seconds, Kog'Maw's basic attacks gain bonus range and deal bonus magic damage, capped at 100 against monsters. removes one; the difference is that Mundo has to be in Infected CleaverInfected CleaverQActive: Dr. Mundo hurls a cleaver in the target direction, dealing magic damage to the first enemy it hits and slowing them by 40% for 2 seconds. Infected Cleaver has a minimum damage threshold. If Infected Cleaver hits an enemy, Dr. Mundo heals for 50% of the health cost. range to do his half. Caustic SpittleCaustic SpittleQPassive: Kog'Maw gains bonus attack speed. Active: Kog'Maw vomits a corrosive projectile that deals magic damage to the first enemy it hits as well as reducing their armor and magic resistance for 4 seconds. shreds what is left.Full matchup page
  • SionSionEnrageEnrageEWhile active, Sion gains Attack Damage, spends Health on each basic attack and permanently gains maximum Health from kills. health is exactly what percent-health on-hit damage is priced against, and Cryptic GazeCryptic GazeQSion's stare terrifies a single enemy, dealing damage and stunning them. is Sion's only way to cross the range it is fired from.Full matchup page

Weak against

  • ShacoShacoKog'Maw has 500 range and no dash. DeceiveDeceiveQActive: Shaco instantly blinks to the target location and becomes invisible for up to 3.5 seconds. Shaco's next basic attack within 6 seconds to critically strike for bonus critical damage. puts Shaco inside it with BackstabBackstabPassiveInnate: Shaco deals 20% bonus damage when attacking an enemy from behind. applied, and Void OozeVoid OozeEActive: Kog'Maw spews a ball of ooze in the target direction, dealing magic damage and slowing enemies for 1 second. The ooze lingers for 3 seconds, slowing enemies who stand in it as well as for 0.25 seconds after they leave the affected area. is a slow on something already standing on him.Full matchup page
  • LeonaLeonaZenith BladeZenith BladeEActive: Leona projects her sword in the target direction that deals magic damage to enemies hit. After reaching its maximum range, if the sword hit an enemy champion during its flight, Leona dashes to 225 units beyond the location of the last champion struck and roots them for 0.5 seconds. Leona is unable to move or attack while Zenith Blade is in flight. She can cast any of her abilities during the dash. into Shield of DaybreakShield of DaybreakQActive: Leona illuminates her shield, empowering her next basic attack within 6 seconds to deal bonus magic damage and stun the target for 1.25 seconds. Shield of Daybreak resets Leona's basic attack timer. is a chain Kog'Maw does not survive, and his answer to being reached is a slow and a corpse that explodes.Full matchup page
  • BlitzcrankBlitzcrankRocket GrabRocket GrabQBlitzcrank fires his right hand to grab an opponent on its path, dealing damage and dragging it back to him. is the whole matchup: pulled out of position, Kog'Maw has no escape at all, and Power FistPower FistEActive: Blitzcrank empowers their next basic attack within 5 seconds to have an uncancellable windup, deal 100% AD bonus physical damage and knock up the target for 1 second. This damage is affected by critical strike modifiers. Power Fist resets Blitzcrank's basic attack timer. keeps him there for the rest of it.Full matchup page
  • AhriAhriCharmCharmEActive: Ahri blows forth a kiss in the target direction that deals magic damage to the first enemy hit, charming and slowing them by 65% for a duration. Charmed enemies take 20% increased damage from Ahri for 6 seconds. is a death sentence on a 500-range carry with no escape; Ahri only has to land one spell to delete Kog'Maw.Full matchup page

Classic vs modern9 base-stat shifts

Base-stat shifts9
Base health
Classic: 524Current League: 635
Health per level
Classic: 84Current League: 99
Health regen
Classic: 1.11Current League: 3.75
Base mana
Classic: 295Current League: 325
Base attack damage
Classic: 49Current League: 61
Attack damage per level
Classic: 3Current League: 0
Base armor
Classic: 17.5Current League: 24
Armor per level
Classic: 3.5Current League: 4.45
Base magic resist
Classic: 30Current League: 33

Skins

  • Kog'Maw

  • Monarch Kog'Maw

  • Pug'Maw

  • Bee'Maw

  • Zap'Maw

  • Victorious Kog'Maw

History & Notes

Released 2010-06-24, part of the 2009–2013 wave Classic drew its roster from. Classic freezes the kit at patch 3.13.24; the modern game still runs its descendant. Riot's next 3 balance steps after the freeze are listed below.

Changed after 3.13

  1. V4.4
    • Caustic Spittle, Targeting changed to a linear skill shot from a targeted ability.
    • Caustic Spittle, Range increased to 1000 from 625.
    • Caustic Spittle, Base damage increased to 80/130/180/230/280 from 60/110/160/210/260
    • Caustic Spittle, AP ratio reduced to 50% AP from 70% AP.
    • Caustic Spittle, Shred increased to 20/22/24/26/28% from 5/10/15/20/25 flat.
    • Caustic Spittle, Mana cost increased to 60 from 50.
  2. V4.5
    • Stats, Base armor increased to 14 from 10.
  3. V4.13
    • Stats, Base health reduced to 400 from 440.
    • Stats, Health per level increased to 87 from 84.
    • Caustic Spittle, Resistance reductions reduced to 12/16/20/24/28% from 20/22/24/26/28%.
Contributors
Reio