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Matchup

Kassadin
Kassadin
27%
73%

vs

50.0%
Heimerdinger
Heimerdinger
20%
80%
Heavy AP damageSustained DPSHeavy pokeHeavy CC

You are stronger late game — farm safe and avoid early trades.

Build vs Heimerdinger

Build adapted to this matchup

Starting items

Dark Seal
Refillable Potion

Core build

Dark Seal
1
Rod of Ages
2HP
Seraph's Embrace
3Mage

Standard

Boots of Swiftness
4vs Slow
Malignance
5Mage

Summoner spells

41274%
41424%

Anti AD

Plated Steelcaps
4vs AD
Zhonya's Hourglass
5vs AD
Frozen Heart
vs AD

Anti Tank

Void Staff
5vs Tank

DPS

Malignance
Mage
Archangel's Staff
Mage
Rabadon's Deathcap
Mage

Other options

Muramana
Mejai's Soulstealer
Manamune
100.0% WR2 games
DominationDomination
ElectrocuteElectrocute
Sudden ImpactSudden Impact
Grisly MementosGrisly Mementos
Ultimate HunterUltimate Hunter
ResolveResolve
Second WindSecond Wind
OvergrowthOvergrowth
Adaptive ForceHealth ScalingHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
KassadinKassadin
HeimerdingerHeimerdinger
Careful
Careful
Aggressive

Heimerdinger's abilities

Passive, spells and ultimate

Hextech Affinity (P)

Gain Move Speed while near allied towers and turrets deployed by Heimerdinger.

Cooldowns

Cooldowns by spell rank

LevelQWER
31s11s11s–
61s11s11s1m40
91s10s11s1m40
111s9s11s1m25
161s7s11s1m10
181s7s11s1m10

Playing against Heimerdinger

How to counter and exploit weaknesses

1

Destroy his turrets first: without them, Heimerdinger deals much less damage and loses his zone control.

2

Don't fight in his turret zone: lure him away from his placements to fight.

3

Ganks are most effective against Heimer — but kill his turrets first or they'll kill you during the gank.

4

Champions with range who can snipe turrets (Syndra, Ziggs, Xerath) counter him well.

Source: op.gg + LTL Engine · Patch 16.9.1 · May 9, 2026