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Matchup

Jax
Jax
50%
50%

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

Dusk and Dawn
1Mage tank
Hextech Gunblade
2Mage
Riftmaker
3Mage tank

Standard

Boots of Swiftness
4vs Slow
Trinity Force
5DPS

Summoner spells

41453%
41237%

Anti AD

Plated Steelcaps
4vs AD
Zhonya's Hourglass
5vs AD
Death's Dance
vs AD
Guardian Angel
vs AD

Anti AP

Mercury's Treads
4vs CC
Wit's End
5vs AP

DPS

Trinity Force
DPS
Sundered Sky
Bruiser
Blade of The Ruined King
DPS

Other options

Sterak's Gage
Survival
100.0% WR2 games
PrecisionPrecision
Lethal TempoLethal Tempo
TriumphTriumph
Legend: AlacrityLegend: Alacrity
Last StandLast Stand
ResolveResolve
UnflinchingUnflinching
Bone PlatingBone Plating
Attack SpeedAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
JaxJax
KassadinKassadin
Neutral
Neutral
Neutral

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