How to win lane as Cassiopeia against Locke · Matchup data reviewed on patch 26.15
Miasma turns assassins off — ground the dash, petrify the dive, and fang the helpless body that was supposed to one-shot you.
Track: Locke's Q — Ritual Nails (10–6s cooldown). The nail marks are his whole engine — without 2-3 stacks on you his blink-in barely dents; sidestep the recasts and punish the ten seconds of nothing.
Read from Cassiopeia's seat: which stage windows this plan plays for against Locke.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Even / skill | Level 1 is a skill matchup since both champions rely on landing their skillshot first to gain any real trade advantage. |
| Level 2 | Even / skill | Level 2 remains close as Locke's missing-HP scaling on Silver Stake competes directly with Cassiopeia's poison poke for who controls the trade math. |
| Level 3 | Even / skill | Level 3 stays contested because Locke's Q-E dash combo threatens a real all-in that Cassiopeia's kite can't always escape cleanly. |
| Levels 4-5 | Even / skill | Levels 4-5 are still a skill matchup since Locke's reset-chain potential off a kill offsets Cassiopeia's growing poison damage. |
| Level 6 | Even / skill | Level 6 remains contested because Purgatory threatens a ranged execute on a poisoned target, forcing careful HP management from Cassiopeia even as she gains her own ultimate. |
| First item | Even / skill | Cassiopeia's first item swings slightly in her favor since sustained poison damage starts out-competing Locke's grey-health steroid if she poisons first. |
| Two+ items | Even / skill | Two items in, the matchup returns to being skill-dependent since Purgatory's execute threat persists at any item count, keeping Locke dangerous even against a scaled Cassiopeia. |
Locke's Silver Stake rewards him for hitting you when you're already missing HP, so the early poke war matters — every Q poison tick you land first denies him bonus scaling on his own hits. His E lets him blink through and dash past minions to close the gap even without flash, so don't assume your range is safe; track his cooldown and back off before he's fully charged. Trade cautiously and let him spend E to engage before committing your own poison chain, since his kit rewards aggression more than yours does at level 1-2.
Pooled Emerald+ win rates from Cassiopeia's side, sampled July 2026.
The full Cassiopeia vs Locke 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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No sample yet — Cassiopeia vs Locke has no Emerald+ win-rate data for this patch; treat it as a skill matchup and play the plan below.
Cassiopeia takes Conqueror on the Precision tree with Presence of Mind, Legend: Haste and Last Stand, and Sorcery secondary (Manaflow Band and Transcendence) vs Locke.
Start Doran's Ring + 2 Health Potions and back for Oblivion Orb (≈800g) — cuts his sustain. Build Seraph's Embrace first, then Liandry's Torment, with No boots — passive move speed (slot goes to Mercury's-substitute MR if needed).
Playing the other side? Locke vs Cassiopeia guide →
All Cassiopeia mid lane matchups →
More Cassiopeia mid lane matchups: vs Katarina · vs LeBlanc · vs Lissandra · vs Lux · vs Malzahar · vs Mel
Also played in: Top Lane