Build Guide by Sinnerzorr

Not Updated For Current Season

This guide has not yet been updated for the current season. Please keep this in mind while reading. You can see the most recently updated guides on the browse guides page.

League of Legends Build Guide Author Sinnerzorr

Kog'Maw: The Abyssal Killer

Sinnerzorr Last updated on January 2, 2011
Like Build on Facebook Tweet This Build Share This Build on Reddit

Ability Sequence

Ability Key Q
Ability Key W
Ability Key E
Ability Key R

Not Updated For Current Season

The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.


Brute Force
Improved Rally

Offense: 21

Strength of Spirit
Veteran's Scars

Defense: 0

Expanded Mind
Blink of an Eye
Mystical Vision
Presence of the Master

Utility: 9

First of all, I want to apologize about my speaking, because english is not my native language.
This is my first build guide, posted to MobaFire, about Kog'Maw: The Mouth of the Abyss.
With this build, I lose only 2 matches with Kog'Maw, and every match I've made at least 10 kills. I like to play attack damage style, and a bit improved health. Only one or two items of attack speed, because the passive stance of "Caustic Spittle" gives you 10/15/20/25/30% increased attack speed. So, it's enough to buy "Phantom Dancer" and "Madred's Bloodrazor".


- Lore
- Champion Abilities
- Summoner Spells
- Pros & Cons
- Allies & Enemies
- Comments and Specifications


When the prophet Malzahar was reborn in Icathia, he was led there by an ominous voice which thereafter anchored itself to his psyche. From within, this voice bestowed upon him terrible purpose, and though Malzahar was no longer tormented by its call, the voice did not cease its unrelenting summons. This baleful beacon's gentle flicker -- now fastened to Runeterra -- drew forth a putrid beast that ambled across a threshold it did not understand, widening a fissure between the spaces which were never meant to meet. There amongst the haunting ruins of Icathia, Kog'Maw manifested in Valoran with unsettling curiosity. The spark which led him to Runeterra teased him still, urging him gently towards Malzahar. It also encouraged him to familiarize himself with his new environment, to the stark horror of everything he encountered on his journey.

The enchanting colors and aromas of Runeterra intoxicated Kog'Maw, and he explored the fruits of the strange world the only way he knew how: by devouring them. At first he sampled only the wild flora and fauna he happened across. As he traversed the parched Tempest Flats, however, he came upon a tribe of nomads. Seemingly unhampered by conventional rules of physics, Kog'Maw consumed every nomad and any obstacles they put in his way, amounting to many times his own mass and volume. The most composed of his victims may have had time to wonder if this was due to the caustic enzymes which stung the ground as they dripped from his gaping mouth, although such musings were abruptly concluded. When his wake of catastrophe reached the Institute of War, an enthusiastic Malzahar greeted him with an enticing prospect: taste the best Runeterra could offer...on the Fields of Justice.

'If that's just hungry, I don't want to see angry.' --Tryndamere, the Barbarian King.

Champion Abilities

Caustic Spittle - Passive: Increases Kog'Maw's attack speed. Active: Kog'Maw launches a corrosive projectile which deals magic damage and corrodes the target's armor for 4 seconds.
Passive: Increases Attack Speed by 10/15/20/25/30%.

Active: Kog'Maw launches a corrosive projectile which deals 60/110/160/210/260 (+0.7) magic damage and reduces the target's armor by 5/10/15/20/25.
Cost: 60/60/60/60/60 Mana
Range: 625

Bio-Arcane Barrage - Kog'Maw's attacks gain range and deal a percent of the target's maximum health as magic damage.
Kog'Maw's attacks gain 130/160/190/220/250 range and deal additional magic damage equal to 2/3/4/5/6% (+0.01)% of the target's maximum Health (Max: 100 Damage vs Monsters). Lasts 6 seconds.
Cost: 50/50/50/50/50 Mana
Range: 530

Void Ooze - Kog'Maw launches a peculiar ooze which damages all enemies it passes through and leaves a trail which slows enemies who stand on it.
Kog'Maw launches ooze which deals 60/110/160/210/260 (+0.7) magic damage to enemies it passes through.

Additionally, it leaves a trail which slows enemies by 28/36/44/52/60% for 4 seconds.
Cost: 80/90/100/110/120 Mana
Range: 1000

Living Artillery - Kog'Maw fires a living artillery shell at a great distance dealing damage and revealing targets. Additionally, multiple Living Artilleries in a short period of time cause them to cost additional mana.
Kog'Maw fires artillery from a great distance. After a short delay, the artillery falls dealing 80/120/160 (+0.3) magic damage and reveals targets for 4 seconds (deals 150% bonus damage to Champions).

Each subsequent Living Artillery in the next 6 seconds costs 40/40/40 additional mana (Max 200).
Cost: 40/40/40 Mana
Range: 1200

Icathian Surprise - Upon dying, Kog'Maw starts a chain reaction in his body which causes him to move faster and detonate after 4 seconds; dealing 100 + (25 x lvl) true damage to surrounding enemies.

Summoner Spells:

Summoner spells are chosen in Champion Select before the start of the game. Each player is allowed two summoner spells chosen from a list of spells determined by the player���¢�¯�¿�½�¯�¿�½s summoner level. These summoner spells can be used in game to aid the player���¢�¯�¿�½�¯�¿�½s champion in various ways. Some summoner spells increase in effectiveness relative to your champion's level, but many provide the same effect at champion level 1 as they do at champion level 18. They also do not have any cost other than their cooldown.
Ghost - Your Champion ignores unit collision and moves 27% faster for 14 seconds.
Cooldown: 210s
Cost: No
Exhaust - Blinds the target (100% miss chance) and slows its Movement Speed by 40% for 3 seconds.

Cooldown: 210s
Cost: No

If you are able to manage those summoners spells, you'll kill the target certanly. Nowone cand escape from Kog'Maw while using this abilities.

Pros & Cons


- Low cooldown on his ultimate.
- Even if he is dead, Kog'Maw is able to kill his target, due to his passive spell.
- Good range at his ultimate and his normal attacks.


- Low amount of mana.
- Primary target in most of cases.
- Easily to be killed.
- Low to moderate health.

Allies & Enemies


Try to go on line with stunners or slowers, like: Cho'Gath, Sion, Evelynn, Amumu, Swain, Ryze, etc.


Be careful if you're fighting on the same line with fighters, like: Xin Zhao, Tryndamere, Mordekaiser, Garen, Gragas, Olaf, Shaco, etc.

Comments and Specifications

First of all, I want to warning you about the strenght of Kog'Maw. Kog'maw doesn't rezist too much in battle. You must stay out of combat as much as posible, and must using Bio-Arcane Barrage, because of his big range. Try to do first blood, and another two or three kills in the next 5-10 minutes. If you do that, you'll became unstopable. Kog'Maw is a late-game hero, and he depends of his items. You have items, GJ, you don't have items, GO AWAY !

Thanks for watching, and, again, sorry for my bad language.
Updates will be posted at the beggining of the description.