How to win lane as LeBlanc against Cassiopeia · 54.14% win rate (1,293 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
You were drafted to eat exactly this — W through the wave, double-proc the sigil, and return before her rotation loads.
Track: Cassiopeia's W — Miasma (24–16s cooldown). Grounds you — dashes and leaps are disabled inside it.
Read from LeBlanc's seat: which stage windows this plan plays for against Cassiopeia.
This is LeBlanc's own plan; across 1,293 pooled games the lane is leaning LeBlanc.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | LeBlanc | No dash and slow poison ramp-up means she loses every early trade you open with Q-W |
| Level 2 | LeBlanc | Same at 2 — Miasma is 24s at rank 1 and one cloud cannot cover a whole lane |
| Level 3 | LeBlanc | At 3 Ethereal Chains roots a champion with no dash — chain from 925, detonate, and the string ends before her poison ramps |
| Levels 4-5 | LeBlanc | Angled engage lets your burst combo kill her before Petrify ever lines up |
| Level 6 | LeBlanc | Mimic at 6 doubles the rotation, and a 120-second Petrifying Gaze only stuns if you are facing her — dash in from behind and it slows |
| First item | Even / skill | Snowballing the lead denies her the farm needed to reach her power items |
| Two+ items | Even / skill | At full build her Petrify+poison output finally out-scales your burst if she catches you facing her |
Cassiopeia's early kit is deceptively soft — no dash, and Twin Fang deals its real damage only into already-poisoned targets, so her output ramps over multiple hits rather than bursting you like you burst her. W in while she's still building poison and she has no way to disengage, since Serpentine Grace only helps once her poison is already on you. Look for all-ins at 3-5 while Miasma is still 24s and cannot ground your exit.
Pooled Emerald+ win rates from LeBlanc's side, sampled July 2026.
The full LeBlanc 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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LeBlanc, slightly — a 54.14% win rate edge over 1,293 games; execution can flip it.
Mostly — LeBlanc has a small statistical edge (54.14% win rate), but execution decides this lane far more than the pick does.
Not a hard counter — LeBlanc has a slight edge (54.14% win rate), and play quality decides the rest.
LeBlanc takes Electrocute on the Domination tree with Cheap Shot, Grisly Mementos and Ultimate Hunter, and Sorcery secondary (Manaflow Band and Transcendence) vs Cassiopeia.
Start Doran's Ring + 2 Health Potions and back for Oblivion Orb (≈800g) — cuts her sustain. Build Stormsurge / Luden's first, then Shadowflame, with Mercury's Treads / Sorcerer's.
Playing the other side? Cassiopeia vs LeBlanc guide →
All LeBlanc mid lane matchups →
More LeBlanc mid lane matchups: vs Aurora · vs Azir · vs Brand · vs Diana · vs Ekko · vs Fizz