How to win lane as Cassiopeia against LeBlanc · 45.86% win rate (1,293 Emerald+ games, lolalytics, sampled July 2026) · 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: LeBlanc's W — Distortion (15–10s cooldown). Dash with a four-second return window — punish the return spot, and remember she is broke after it.
Read from Cassiopeia's seat: which stage windows this plan plays for against LeBlanc.
This is Cassiopeia's own plan; across 1,293 pooled games the lane is leaning LeBlanc.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Cassiopeia | Level 1 favors LeBlanc since Sigil of Malice is point-and-click at 700 range while Cassiopeia's Q is a delayed zone she can walk out of. |
| Level 2 | Cassiopeia | Level 2 favors LeBlanc as Distortion lets her burst in and leave before Cassiopeia's poison finishes ticking, and Miasma is not online yet. |
| Level 3 | Cassiopeia | Level 3: Cassiopeia's poison DoT racks up over the whole trade while LeBlanc's damage is front-loaded and easily disengaged from. |
| Levels 4-5 | Cassiopeia | Levels 4-5 remain favorable for Cassiopeia as her range and sustained pressure outpace LeBlanc's cooldown-gated burst. |
| Level 6 | LeBlanc | Level 6 flips to LeBlanc because her full ultimate-empowered combo can burst Cassiopeia down before Cassiopeia's own ultimate is available to punish back. |
| First item | Cassiopeia | First item is a skill row: sustained poison out-damages her burst in a long fight, but she still chooses when the fight starts. |
| Two+ items | Cassiopeia | Two items in it stays skill: Cassiopeia wins anything extended, LeBlanc wins anything that opens with a chain out of the fog. |
LeBlanc's early trades come from her Sigil of Malice proc plus E root, so respect that combo but don't be afraid to poke back with Q since she has no sustain to out-heal your poison. Levels 1-3 are close, but you generally win extended trades since your poison ticks continue after she disengages. Watch her mana bar — she's not infinite on resources and has to commit E to land real damage. Miasma denies her repositioning if she tries to weave in and out for pokes.
Pooled Emerald+ win rates from Cassiopeia's side, sampled July 2026.
The full Cassiopeia vs LeBlanc 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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LeBlanc, slightly — Cassiopeia wins 45.86% of 1,293 games; winnable with the right plan.
Mostly — LeBlanc has a small statistical edge (54.14% win rate), but execution decides this lane far more than the pick does.
No — if anything LeBlanc has the slight edge (Cassiopeia wins 45.86%), though it stays close.
Cassiopeia takes Conqueror on the Precision tree with Presence of Mind, Legend: Haste and Last Stand, and Sorcery secondary (Manaflow Band and Transcendence) vs LeBlanc.
Start Doran's Ring + 2 Health Potions and back for Tear of the Goddess + Dark Seal (≈800g). 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? LeBlanc vs Cassiopeia guide →
All Cassiopeia mid lane matchups →
More Cassiopeia mid lane matchups: vs Karma · vs Kassadin · vs Katarina · vs Lissandra · vs Locke · vs Lux