How to win lane as Zac against Cassiopeia · 35.38% win rate (65 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
She kites you out — survive, then slingshot her on the Miasma cooldown and out-sustain on blobs.
Track: Cassiopeia's W — Miasma (24–16s cooldown). Grounds you — dashes and movement abilities are disabled inside it.
Read from Zac's seat: which stage windows this plan plays for against Cassiopeia.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Cassiopeia | Noxious Blast is a flat 3.5s cooldown at every rank. |
| Level 2 | Cassiopeia | Twin Fang only spikes on targets already poisoned. |
| Level 3 | Cassiopeia | Miasma grounds you from 3 — 24s at rank 1, so bait it out. |
| Levels 4-5 | Cassiopeia | Through 4-5 her sustained DPS out-damages your HP regen. |
| Level 6 | Cassiopeia | Petrifying Gaze stuns you only if you are facing her. |
| First item | Cassiopeia | At first item her poison DPS melts you before you reach her. |
| Two+ items | Zac | With 2+ items your tank pool eats her poison and E-R kills her. |
Cassiopeia poisons you with Noxious Blast every 3.5s, then Twin Fang hits harder and heals her off anything already poisoned — so the counter is not being poisoned. Soak XP at range and never slingshot into Miasma.
Pooled Emerald+ win rates from Zac's side, sampled July 2026.
The full Zac vs Cassiopeia 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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Cassiopeia — Zac wins only 35.38% of 65 games, so Zac plays this as the disadvantaged side.
Not really — Cassiopeia holds a real statistical advantage (64.62% win rate), so Zac is the one working uphill.
No — Cassiopeia counters Zac (Zac wins only 35.38% of games). Play it as the disadvantaged side and lean on the windows in the plan.
Zac takes Grasp of the Undying on the Resolve tree with Demolish, Second Wind and Overgrowth, and Precision secondary (Triumph and Legend: Haste) vs Cassiopeia.
Start Doran's Shield + Health Potion and back for Core component + boots (≈1300g). Build Heartsteel (HP feeds everything) first, then Spirit Visage / Thornmail, with Mercury's Treads.
Playing the other side? Cassiopeia vs Zac guide →
All Zac top lane matchups →
More Zac top lane matchups: vs Ambessa · vs Aurora · vs Camille · vs Cho'Gath · vs Darius · vs Dr. Mundo