How to win lane as Sion against Kassadin · 47.28% win rate (1,652 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
Bully him early — charge Q on the Riftwalk cooldown and out-HP the lane.
Track: Kassadin's R — Riftwalk (5–2s cooldown). His mobility spike at 6. Kill him before it scales.
Read from Sion's seat: which stage windows this plan plays for against Kassadin.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Sion | Your charged Q knockup is physical and unblockable by his passive magic shield — it is your only level-1 threat before he has Q to silence you. |
| Level 2 | Even / skill | He has Q silence but no mobility yet; a tight lane and patient charge timing can bait the silence cooldown and land the knockup. |
| Level 3 | Kassadin | Null Sphere is a 650-range orb on 8s that interrupts and shields him from magic — he does not need to fight you, just break your rhythm and walk away. |
| Levels 4-5 | Kassadin | With Riftwalk online he blinks 500 units out when you start the charge, but at rank 1 it is a 5s cooldown — engage in the window right after he burns it. |
| Level 6 | Kassadin | His Riftwalk stacks and roam range compound every minute — he wins neutral farm and roams to impact mid while you are stuck splitpushing with no mobility to match. |
| First item | Kassadin | His first AP item pushes Null Sphere's trade damage above what your W-shield can absorb, and rank-2 Riftwalk on 3.5s dodges nearly every engage attempt you make. |
| Two+ items | Kassadin | Full AP Kassadin deletes you before your zombie passive activates and blinks away from the retaliation — your HP stacking is irrelevant against his burst damage. |
You are a genuine threat at level 1 and level 2: Void Stone only reduces magic damage, so your charged Q knockup and Roar of the Slayer armour shred land at full value. Walk him toward a wall or tight chokepoint, let him push and farm, then start charging Q when he steps up to last-hit. Bait Null Sphere by walking forward without charging, then charge once it is down — it is 9s at rank 1. Watch his auto wind-up rather than his casts: Nether Blade is a 7s empowered attack and that animation is the real tell. Void Stone also means he ignores unit collision, so the wave will not body-block him. Get a knockup before level 3; it sets the HP trade in your favour before the matchup inverts.
Pooled Emerald+ win rates from Sion's side, sampled July 2026.
The full Sion vs Kassadin 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 — Sion wins 47.28% of 1,652 games; winnable with the right plan.
Mostly — Kassadin has a small statistical edge (52.72% win rate), but execution decides this lane far more than the pick does.
No — if anything Kassadin has the slight edge (Sion wins 47.28%), though it stays close.
Sion takes Grasp of the Undying on the Resolve tree with Demolish, Second Wind and Overgrowth, and Precision secondary (Triumph and Legend: Haste) vs Kassadin.
Start Doran's Shield + Health Potion and back for Core component + boots (≈1300g). Build Heartsteel (W + passive love HP) first, then Warmog's Armor / Thornmail, with Mercury's Treads.
Playing the other side? Kassadin vs Sion guide →
All Sion top lane matchups →
More Sion top lane matchups: vs Jayce · vs K'Sante · vs Karma · vs Kayle · vs Kennen · vs Kled