How to win lane as Kassadin against Sion · 52.72% win rate (1,652 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
Two scalers, one lane — except your curve goes vertical and his plateaus. Farm politely and win later.
Track: Sion's Q — Decimating Smash (10–6s cooldown). Charged knockup — break the channel or sidestep the slam.
Read from Kassadin's seat: which stage windows this plan plays for against Sion.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Sion | At level 1 a fully-charged Decimating Smash into a Soul Furnace detonation is real burst, and you have only Null Sphere's shield and no blink to answer. |
| Level 2 | Even / skill | He out-shoves with Roar of the Slayer (E), which shreds Armor and slows, and threatens a full-charge Smash while you lack the tools to punish — play safe. |
| Level 3 | Kassadin | Your maxed Q shield now soaks his E poke and you farm under tower while his charged Q stays a contained threat — the lane tips your way as neither can commit but you scale. |
| Levels 4-5 | Kassadin | Riftwalk lets you blink over the Q charge and out of his E shred-line, removing his one catch tool and giving you the kill threat instead. |
| Level 6 | Kassadin | Your Catalyst into Rod of Ages erases the W-detonation fear, and Force Pulse off your own casts punishes every burned Q. |
| First item | Kassadin | With items you free-farm behind the Q shield while he can no longer shove you off the wave, and you out-roam his immobile body. |
| Two+ items | Kassadin | Riftwalk stacks let you blink-kite his immobile frame forever — but never stand on the corpse, because Glory in Death revives him swinging. |
Sion's whole early kill threat is a fully-charged Decimating Smash (Q) — held long enough it knocks up and stuns, and Soul Furnace (W) detonates on a locked target while pre-6 you have only Null Sphere's shield and no blink. Don't contest the wave: last-hit at max Q range and walk perpendicular to the wind-up, because a Smash released early deals damage with no stun at all. Use Nether Blade on a creep to refund mana so you are never forced off lane. And read Roar of the Slayer (E) correctly — it shreds Armor and slows, not Magic Resist, and it does not touch your Q shield.
Pooled Emerald+ win rates from Kassadin's side, sampled July 2026.
The full Kassadin vs Sion report continues with the mid-game plan, the late-game and teamfight plan, every power spike to play around, and the win conditions for both sides — plus cooldown tracking and the live enemy-jungle tracker inside the app.
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Kassadin, slightly — a 52.72% win rate edge over 1,652 games; execution can flip it.
Mostly — Kassadin has a small statistical edge (52.72% win rate), but execution decides this lane far more than the pick does.
Not a hard counter — Kassadin has a slight edge (52.72% win rate), and play quality decides the rest.
Kassadin takes Fleet Footwork on the Precision tree with Triumph, Legend: Haste and Last Stand, and Resolve secondary (Second Wind and Bone Plating) vs Sion.
Start Doran's Shield + 1 Health Potion and back for Tear of the Goddess + Dark Seal (≈800g). Build Rod of Ages first, then Seraph's Embrace, with Plated Steelcaps.
Playing the other side? Sion vs Kassadin guide →
All Kassadin top lane matchups →
More Kassadin top lane matchups: vs Sett · vs Shen · vs Singed · vs Swain · vs Sylas · vs Tahm Kench