How to win lane as Vex against Cassiopeia · 54.2% win rate (786 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15
An even poke war where her mobility advantage doesn't exist — trade marked rotations and let Gloom math grind the margins.
Track: Cassiopeia's W — Miasma (24–16s cooldown). Grounds you — dashes and leaps are disabled inside it.
Read from Vex's seat: which stage windows this plan plays for against Cassiopeia.
This is Vex's own plan; across 786 pooled games the lane is leaning Vex.
| Stage | Favoured | Why |
|---|---|---|
| Level 1 | Even / skill | At level 1 you out-range Cass, who leans on Q mainly for movement, so you win the poke. |
| Level 2 | Even / skill | At 2 your empowered Q and W burst beat her before Miasma and E-sustain exist. |
| Level 3 | Even / skill | By 3 you still dictate range and punish her short Noxious Blast walk-ups. |
| Levels 4-5 | Cassiopeia | At 4-5 her Miasma grounds you and Twin Fang sustain flips extended trades to Cass. |
| Level 6 | Even / skill | Your level 6 R is a hard pick on a dash-less target, swinging the ult window back to you. |
| First item | Cassiopeia | Her first-item tear spike makes Twin Fang out-DPS you in any grounded fight, favouring Cass. |
| Two+ items | Even / skill | Two items in your R burst and shield delete her before Twin Fang ramps, restoring your edge. |
You have the range and burst edge at levels 1-3 — she's stuck using Q (Noxious Blast) mostly for movespeed and can't punch back, so land empowered Q and W poke before her kit comes online. Track Cassiopeia Miasma (W): 24s at rank 1, 16 at max — it grounds you, so your R recast dash dies inside the pool. Its downtime is the green light.
Pooled Emerald+ win rates from Vex's side, sampled July 2026.
The full Vex 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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Vex, slightly — a 54.2% win rate edge over 786 games; execution can flip it.
Mostly — Vex has a small statistical edge (54.2% win rate), but execution decides this lane far more than the pick does.
Not a hard counter — Vex has a slight edge (54.2% win rate), and play quality decides the rest.
Vex 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 Luden's Companion first, then Shadowflame, with Sorcerer's Shoes / Mercury's Treads.
Playing the other side? Cassiopeia vs Vex guide →
All Vex mid lane matchups →
More Vex mid lane matchups: vs Aurora · vs Azir · vs Brand · vs Diana · vs Ekko · vs Fizz