
Kog'Maw Build
the Mouth of the Abyss
Belched forth from a rotting Void incursion deep in the wastelands of Icathia, Kog'Maw is an inquisitive yet putrid creature with a caustic, gaping mouth. This particular Void-spawn needs to gnaw and drool on anything within reach to truly understand it. Though not inherently evil, Kog'Maw's beguiling naiveté is dangerous, as it often precedes a feeding frenzy—not for sustenance, but to satisfy its unending curiosity.
The most played Kog'Maw Bot build on patch 26.21 runs Lethal Tempo with Triumph, Legend: Bloodline and Last Stand, plus Conditioning and Overgrowth from the secondary tree. Take Flash and Barrier. Start with Doran's Bow and Health Potion, then build Berserker's Greaves, Guinsoo's Rageblade and Navori Flickerblade, followed by Terminus, Jak'Sho, The Protean, Wit's End and Blade of The Ruined King. Max W (Bio-Arcane Barrage) first, then Q (Caustic Spittle), then E (Void Ooze). It has a 52.7% win rate and a 2.4% pick rate.
Runes
Primary
Lethal Tempo
Attacking an enemy champion grants you Attack Speed, up to 6 stacks. At max stacks, deal bonus adaptive damage On-Attack.
Lethal Tempo
Attacking an enemy champion grants you [6% Melee || 4% Ranged] Attack Speed for 6 seconds, up to 6. At max stacks, deal [9 - 30 Melee || 6 - 24 Ranged] bonus adaptive damage On-Attack, increased by 1% per 1% Bonus Attack Speed.
Triumph
Takedowns restore 5% of your missing health and grant an additional 20 gold.
Triumph
Takedowns restore 5% of your missing health, 2.5% of your max health, and grant an additional 20 gold. 'The most dangerous game brings the greatest glory.' —Noxian Reckoner
Legend: Bloodline
Takedowns on enemies grant permanent Life Steal, up to a cap. Once the cap is reached, increase your max health. Weaker earlier but stronger later game than other Legend Runes.
Legend: Bloodline
Gain 0.45% Life Steal for every Legend stack (max 15 stacks). At maximum Legend stacks, gain 85 max health. Earn progress toward Legend stacks for every champion takedown, epic monster takedown, large monster kill, and minion kill.
Last Stand
Deal more damage to champions while you are low on health.
Last Stand
Deal 5% - 11% increased damage to champions while you are below 60% health. Max damage gained at 30% health.
Secondary
Conditioning
After 12 min gain +8 Armor and +8 Magic Resist and increase your Armor and Magic Resist by 3%.
Conditioning
After 12 min gain +8 Armor and +8 Magic Resist and increase your Armor and Magic Resist by 3%.
Overgrowth
Gain permanent max health when minions or monsters die near you.
Overgrowth
Absorb life essence from monsters or enemy minions that die near you, permanently gaining 3 maximum health for every 8. When you've absorbed 120 monsters or enemy minions, gain an additional 3.5% maximum health.
Summoner Spells
Flash
Cooldown 300s
Flash
Cooldown 300s
Teleports you a short distance toward your cursor.
Barrier
Cooldown 180s
Barrier
Cooldown 180s
Gain a brief Shield.
Skill Priority
WBio-Arcane Barrage
Cooldown 17s · 40 Mana
Kog'Maw's attacks gain range and deal a percent of the target's maximum health as magic damage %i:OnHit% On-Hit.
QCaustic Spittle
Cooldown 7s · 40 Mana
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.
EVoid Ooze
Cooldown 12s · 40/55/70/85/100 Mana
Kog'Maw launches a peculiar ooze which damages all enemies it passes through and leaves a trail which slows enemies who stand on it.
Item Build
Full build 18,950gStarting Items
Doran's Bow
400g
Doran's Bow
- 8 Attack Damage
- 15% Attack Speed
- 1.5% Omnivamp
Health Potion
2 × 50g
Health Potion
Consume Restores 120 Health over 15 seconds.
Core Build
1Berserker's Greaves
1,100g30% AS · 45 MS
Berserker's Greaves
1,100g- 30% Attack Speed
- 45 Move Speed
Enhances Move Speed and Attack Speed
2Guinsoo's Rageblade
3,000g30 AD · 30 AP · 25% AS
Wrath · Seething Strike
Guinsoo's Rageblade
3,000g- 30 Attack Damage
- 30 Ability Power
- 25% Attack Speed
Wrath Attacks deal 30 bonus magic damage On-Hit. Seething Strike Attacks grant 8% Attack Speed for 4 seconds. (stacks 4 times). While fully stacked, every third Attack applies On-Hit effects twice.
3Navori Flickerblade
2,650g40% AS · 25% Crit · 4% MS
Transcendence
Navori Flickerblade
2,650g- 40% Attack Speed
- 25% Critical Strike Chance
- 4% Move Speed
Transcendence Attacks reduce Basic Ability cooldowns by 15% of their remaining cooldown.
4Terminus
3,000g30 AD · 35% AS
Shadow · Juxtaposition
Terminus
3,000g- 30 Attack Damage
- 35% Attack Speed
Shadow Attacks deal bonus magic damage On-Hit. Juxtaposition Alternate between Light and Dark Attacks against champions: Light Attacks grant Armor and Magic Resist for 5s. Dark Attacks grant 10% Armor Penetration and Magic Penetration for 5s.
5Jak'Sho, The Protean
3,200g350 HP · 45 Armor · 45 MR
Voidborn Resilience
Jak'Sho, The Protean
3,200g- 350 Health
- 45 Armor
- 45 Magic Resist
Voidborn Resilience After 5 seconds of champion combat, increase your bonus Armor and Magic Resist by 30% until end of combat.
6Wit's End
2,800g50% AS · 45 MR · 20% Tenacity
Fray
Wit's End
2,800g- 50% Attack Speed
- 45 Magic Resist
- 20% Tenacity
Fray Attacks deal bonus magic damage On-Hit.
7Blade of The Ruined King
3,200g40 AD · 25% AS · 10% Life Steal
Mist's Edge · Clawing Shadows
Blade of The Ruined King
3,200g- 40 Attack Damage
- 25% Attack Speed
- 10% Life Steal
Mist's Edge Attacks deal a percentage of enemy's current Health as bonus physical damage On-Hit. Clawing Shadows Attacking a champion 3 times Slows them by 30% for 1 second.
Abilities & Skill Path

Icathian Surprise
4 seconds after dying, Kogmaw explodes, dealing true damage to surrounding enemies.
QCaustic Spittle
Cooldown 7s · 40 Mana
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 Barrage
Cooldown 17s · 40 Mana
Kog'Maw's attacks gain range and deal a percent of the target's maximum health as magic damage %i:OnHit% On-Hit.
EVoid Ooze
Cooldown 12s · 40/55/70/85/100 Mana
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 Artillery
Cooldown 2/1.5/1s · 40 Mana
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.