How to win lane as Cassiopeia against Zac · 64.62% win rate over 65 Emerald+ games · Updated 2026-07-27
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Even / skill | You both have nothing at level 1 — one ability and no Q poison to feed Twin Fang yet — so deny his last-hits and don't trade into his autos for free. |
| Level 2 | Cassiopeia | Your second point lets you prime-Q the zone then E the poisoned cell for a real trade, and his slow walk-up can't punish Serpentine Grace's move speed. |
| Level 3 | Cassiopeia | Full Q-into-E poison plus move-speed kiting comes online and his blob has no dash to escape your chain Twin Fangs. |
| Levels 4-5 | Cassiopeia | Ranks in Q and E let you spam Twin Fang on an immobile tank — W (Miasma) grounds his E sling so he can never close the gap. |
| Level 6 | Cassiopeia | Petrifying Gaze stuns him mid-sling and turns his engage into your kill before his passive blobs can re-merge. |
| First item | Cassiopeia | Liandry's-style percent burn shreds his tank HP faster than his passive blob regen heals, and W keeps his only engage shut off. |
| Two+ items | Cassiopeia | You stay ahead in lane — his off-meta isolated tank kit trades evenly at best, and W permanently answers his dash-reliant all-in. |
Level 1 is the only even patch — you have one ability and no Q poison to feed Twin Fang yet, so don't let an early Q poke or autos chunk you for free; just last-hit and stay healthy. From level 2 you flip it: place Q so the zone poisons him, then E the poisoned cell, and Serpentine Grace's move speed lets you walk out of his slow approach. The thing that loses you the lane is eating a fog E sling before your W is online, so ward the side brush and keep Miasma ready to ground any sling he throws.
The full Cassiopeia vs Zac 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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Playing the other side? Zac vs Cassiopeia guide →
All Cassiopeia top lane matchups →