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Kog’Maw Guide

Ability numbers checked on patch 26.21 · Strategy reviewed: October 2026

Kog'Maw splash art for this Kog'Maw guide

Kog’Maw plays the bot lane as the Mouth of the Abyss hyper-carry marksman on patch 26.22. Caustic Spittle fires a short-range line that deals magic damage and reduces target Armor and MR. Bio-Arcane Barrage grants Kog’Maw bonus Attack Speed and extends his auto range for 8 seconds. Void Ooze fires a line of ooze that slows enemies. Living Artillery fires an unlimited-cast artillery at a target location (Mana cost ramps per cast).

Kog’Maw’s Data Dragon file lists him under Marksman and Mage tags, 6 out of 10 difficulty rating, 500 ranged auto range, and Mana as the pool. His Icathian Surprise passive makes Kog’Maw walk slowly and detonate on death for massive AoE damage.

Abilities and role

Kog’Maw’s lane plan on patch 26.22 is the bot-lane solo-queue hyper-carry ADC. The Bio-Arcane Barrage extended auto range turns his 500 ranged auto into a 700+ ranged weapon; his percent-max-HP on-hit damage shreds tank-heavy enemy comps.

Icathian Surprise (Passive)

Kog’Maw walks slowly for 4 seconds on death and detonates for massive AoE damage. For what it’s worth, Icathian Surprise is Kog’Maw’s primary teamfight-swing engine; a committed death during a 5v5 engage still contributes an all-in AoE detonation on the enemy team.

Caustic Spittle (Q)

Kog’Maw fires a short-range line that deals magic damage and reduces target Armor and MR for 4 seconds. 7 second cooldown, 40 mana. The Q is Kog’Maw’s primary setup tool; a committed Caustic Spittle during an all-in trade reduces the enemy ADC’s resistances for the follow-up Bio-Arcane auto chain.

Bio-Arcane Barrage (W)

Kog’Maw gains bonus Attack Speed and extends his auto range for 8 seconds. During the duration, his basic autos deal bonus percent-max-HP magic damage. 17 second cooldown, 50 mana. The W is Kog’Maw’s primary damage ability; a committed Bio-Arcane Barrage during an all-in teamfight extends his auto range for max safe-DPS positioning.

Void Ooze (E)

Kog’Maw fires a line of ooze at a target direction. Enemies hit are slowed for 4 seconds. 12 second cooldown, 80 mana. The E is Kog’Maw’s primary chase-plus-slow tool; a committed Void Ooze on the enemy ADC sticks the slow for an all-in Bio-Arcane auto chain.

Living Artillery (R)

Kog’Maw fires an unlimited-cast artillery at a target location. Each cast ramps the Mana cost. 2 to 1 second cooldown, 40 Mana (stacking per cast). The R is Kog’Maw’s primary long-range poke tool; a committed Living Artillery spam cycle lands continuous damage on retreating enemies.

Build and item spikes

Kog’Maw’s lane start pairs Doran’s Blade with a Potion. First item is Guinsoo’s Rageblade for the hybrid on-hit scaling that pays off every Bio-Arcane Barrage auto chain.

Slot two picks Nashor’s Tooth for the Attack Speed plus on-hit damage proc that compounds with the Guinsoo’s percent-max-HP burst. Slot three flexes to Wit’s End against AP-heavy enemy comps for the Magic Resist on-hit damage, Blade of the Ruined King for the percent-current-HP shred against tanks, or Rabadon’s Deathcap on hyper-scaling drafts for the AP multiplier (Kog’s AP ratios on W and R are strong). Full first-through-sixth-item path lives on our LoL items database.

How to play by game stage

Pre-6 Kog’Maw plays Caustic Spittle pokes on the enemy ADC during cannon-wave resets. Weave Bio-Arcane Barrage activations during committed trade windows for the extended auto range. First solo kill opens at level 6 with Living Artillery long-range poke plus Caustic Spittle resistance-shred plus Bio-Arcane auto chain.

Mid game (7-13): Save R Living Artillery for the enemy ADC’s rotation back from base at low HP.

Late game (14+): Kog’Maw fights from the ally backline. Bio-Arcane Barrage extended auto range during committed teamfights lands 700+ range autos. A Wit’s End fourth item amps the Magic Resist on-hit damage against AP-heavy enemy comps.

Who counters Kog’Maw

Kog’Maw’s weakness list on 26.22 picks out specific pressure types. Dive supports (Leona, Nautilus, Rell) commit before Bio-Arcane Barrage can activate. Mobile assassins (Rengar, Khazix, Zed) dive during his slow Icathian Surprise pre-detonation window. Peel-oriented enchanters (Milio, Lulu, Janna) cancel his committed R Living Artillery setup on the ally ADC with ult cleanses.

  • Dive supports: Leona, Nautilus, Rell. Each commit before Bio-Arcane Barrage activates.
  • Mobile assassins: Rengar, Kha’Zix, Zed. Each dive during Kog’Maw’s slow Icathian Surprise pre-detonation window.
  • Peel enchanters: Milio, Lulu, Janna.

Deeper matchup notes with ability-level timings for every Kog’Maw opponent land on the Kog’Maw counters page.

ARAM notes

On Howling Abyss, Kog’Maw’s kit shines (stacked bridge fights amp his percent-max-HP on-hit output). Guinsoo’s Rageblade opens for the hybrid on-hit scaling during long bridge standoffs. Nashor’s Tooth arrives second for the Attack Speed on committed Bio-Arcane auto chains. Wit’s End lands third against AP-heavy enemy comps for the Magic Resist on-hit damage. R Living Artillery spam cycle across the bridge choke poisons retreating enemies for continuous damage.

Kog’Maw ARAM pairs well with hard-engage ally supports (Leona, Nautilus, Rell) whose CC chain pins enemies long enough for the committed Bio-Arcane auto chain. The Kog’Maw ARAM build page carries the full item path and matchup table.

Kog’Maw skins

Skins: 15 · Newest: Pug’Maw (2026)

Theme-wise, the lineup includes Arcanist, Battlecast, Pug’Maw, Reindeer and multiple event drops. Three stand out for full VFX reworks on R Living Artillery animation.

  • Arcanist Kog’Maw (1350 RP): celestial-mage theme with reworked arcane-shard Caustic Spittle and ritual-R Living Artillery.
  • Battlecast Kog’Maw (1350 RP): sci-fi-mech theme with reworked plasma Caustic Spittle and robot-R Living Artillery.
  • Pug’Maw (975 RP): dog-event theme with reworked tennis-ball Caustic Spittle and dog-R Living Artillery.

See All Kog’Maw skins and prices for the full catalogue with RP tags and release years.

FAQ

Is Kog'Maw easy to learn?

6/10 and the easiest hyper-carry. Autos extend to 700+ range with W Bio-Arcane Barrage active, and R Living Artillery is a point-and-click AoE snipe. New players stand too close in teamfights (dying to enemy frontline); mains kite at 650+ range behind the ally frontline tank. His R stacks a mana cost — do not spam R to clear waves, you will OOM and die to the enemy mid.