Kog'Maw is a C tier Mid Lane champion in League of Legends Patch 16.5 with a 49.1% win rate in Emerald+ ranked games, according to OP.GG data. The optimal Kog'Maw build starts with Doran's Blade and Health Potion, with core items being Infinity Edge, Phantom Dancer, Bloodthirster and Berserker's Greaves. For runes, run Lethal Tempo from Precision with Domination as the secondary tree. Skill priority is Q > W > E. Kog'Maw is best played with Flash and Teleport as summoner spells. The most challenging matchup in Mid Lane is Diana (S+ tier, 53.4% win rate).
Source: OP.GG Emerald+ ranked data, Patch 16.5 · Last updated: March 2026 · Meridian Zero Analytics
Best Build — Patch 16.5
Start
Doran's BladeHealth Potion
Core
Infinity EdgePhantom DancerBloodthirster
Boots
Berserker's Greaves
Spells
FlashTeleport
Priority
Q > W > E
Expert Tips
- Bio-Arcane Barrage (W) range extension is your entire identity. Activate it for every extended trade.
- Void Ooze (E) slow + Living Artillery (R) combo is your poke pattern. Q-E to slow, then rain Rs.
- You're immobile. Always play behind your support and rely on them to peel divers. Never walk up without protection.
Mid Lane Matchups — Difficulty by Opponent
| Opponent | Tier | Difficulty | |
|---|---|---|---|
Diana
|
S+ | Hard | Analyze → |
Ahri
|
S+ | Hard | Analyze → |
Zed
|
S+ | Hard | Analyze → |
Vex
|
S | Hard | Analyze → |
Fizz
|
S | Hard | Analyze → |
Zoe
|
S | Hard | Analyze → |
Aurelion Sol
|
S | Hard | Analyze → |
Twisted Fate
|
S | Hard | Analyze → |
Xerath
|
S | Hard | Analyze → |
Katarina
|
S | Hard | Analyze → |
Mel
|
S | Hard | Analyze → |
Sylas
|
S | Hard | Analyze → |
Runes — Patch 16.5
KeystoneLethal Tempo
Primary TreePrecision
Slot 1Triumph
Slot 2Legend: Alacrity
Slot 3Coup de Grace
Secondary TreeDomination
Secondary 1Taste of Blood
Secondary 2Treasure Hunter