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Matchup

Sett
Sett
89%
11%

vs

50.0%
Kassadin
Kassadin
27%
73%
Heavy AP damageHigh burstDive threatSplit push

Build vs Kassadin

Build adapted to this matchup

Starting items

Doran's Blade
Health Potion

Core build

Blade of The Ruined King
1DPS
Titanic Hydra
2Bruiser
Overlord's Bloodmail
3HP

Standard

Boots of Swiftness
4vs Slow
Stridebreaker
5Bruiser

Summoner spells

41475%
41217%

Anti AD

Plated Steelcaps
4vs AD
Dead Man's Plate
5vs AD

Anti Tank

Black Cleaver
5vs Tank

DPS

Stridebreaker
Bruiser
Spear of Shojin
Bruiser
Hullbreaker
Bruiser

Other options

Sterak's Gage
Survival
Warmog's Armor
Survival
100.0% WR1 games
PrecisionPrecision
ConquerorConqueror
TriumphTriumph
Legend: AlacrityLegend: Alacrity
Last StandLast Stand
ResolveResolve
UnflinchingUnflinching
Second WindSecond Wind
Attack SpeedAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
SettSett
KassadinKassadin
Favorable
Favorable
Passive

Kassadin's abilities

Passive, spells and ultimate

Void Stone (P)

Kassadin takes reduced magic damage and ignores unit collision.

Cooldowns

Cooldowns by spell rank

LevelQWER
310s7s21s–
69s7s21s5s
98s7s21s5s
118s7s21s3.5s
168s7s19s2s
188s7s17s2s

Playing against Kassadin

How to counter and exploit weaknesses

1

Punish Kassadin VERY hard in early game (levels 1-5): he's one of the weakest champions at that stage.

2

AD champions in midlane counter him: his passive and Q shield only work against magic damage.

3

Do NOT let the game go to late game: a level 16 Kassadin with his items is nearly impossible to stop.

4

His R consumes a lot of mana when stacking — force him to use multiple Rs to drain his mana.

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