Zedvs Cassiopeia
Zed vs Cassiopeia is a decisive matchup in LoL patch 26.19. Zed wins with a 72.7% win rate (+45.5%) over Cassiopeia based on 11 games. Zed holds the advantage in both the early and late game. Below you'll find the best Zed build, runes, laning stats, and strategies for the Zed vs Cassiopeia matchup.
Zed Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Zed performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.
Who wins Zed vs Cassiopeia?
Zed wins 55.6% of these games. With this many games the true rate is most likely between 37.3% and 72.4% (95% range).
- Expected
- 50.7% From both champions' overall Mid win rates
- Matchup effect
- +4.9 pts Observed minus expected
- Sample
- 27 games Lane: Mid
- vs patch 26.18
- — Not enough games on both patches
Lane: Mid · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Zed, but the sample is too limited for a strong conclusion: Zed wins 55.6% of 27 games (95% range 37.3–72.4%).
- Both champions' overall Mid win rates predict 50.7% for Zed; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Zed players pick Health Scaling (defense) far more often against Cassiopeia: 86.4% of their other Mid games, 100.0% here.
How we calculate this
Games: ranked Solo/Duo and Flex games on the North America server from the patch shown. Remakes (games under 5 minutes) are excluded.
A game only counts when Zed and Cassiopeia played the same position on opposite teams, so roaming, lane swaps within a team or a champion merely being in the same game never count as this matchup.
The 95% range is a Wilson score interval. Confidence comes from how wide that range is: within ±3 points is very high, ±5 high, ±8 moderate, anything wider low. Below 20 games a matchup is not classified at all.
Expected win rate combines both champions’ win rates in this lane (same games and filters) with the log5 formula: E = A(1−B) / (A(1−B) + B(1−A)). Matchup effect = observed − expected.
"What changes" compares Zed's choices in this matchup with the same champion's other games in the same lane, and lists a change only when it is at least 3 points and statistically significant (two-proportion z-test, |z| ≥ 2, 20+ games).
Results are not split by rank: the sample per rank is too small for honest per-rank matchup numbers.
Zed vs Cassiopeia Laning Stats
Only 27 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Zed vs Cassiopeia Win Rate by Game Length
Zed's win rate against Cassiopeia by game length. The dot is the win rate, the bar its 95% range and the dashed line the champion's usual win rate at that length. Lengths with fewer than 25 games are left blank.
No game length stands out: Zed's results against Cassiopeia in short and long games are within the margin of error of each other.
Zed vs Cassiopeia Power Spikes
Who is ahead at each stage, measured from these games. A stage reads "Even" when the difference is inside the margin of error, and "Insufficient data" when there are too few games to tell.
- Lane (15 min)Insufficient data
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Zed Changes Against Cassiopeia
Choices Zed players make noticeably more or less often in this matchup than in their other Mid games.
Health Scaling (defense)Stat shardUsually86.4%vs Cassiopeia100.0%+13.6 pts55.6% WR here
Doran's Shield + Health PotionStarting itemsUsually5.3%vs Cassiopeia18.5%+13.3 pts
Doran's Shield + Health Potion + Stealth WardStarting itemsUsually3.1%vs Cassiopeia11.1%+8.0 pts
SwiftmarchBootsUsuallyunder 0.5%vs Cassiopeia3.7%+3.7 pts
Cleanse + FlashSummoner spellsUsuallyunder 0.5%vs Cassiopeia3.7%+3.7 pts
Absorb LifeRuneUsuallyunder 0.5%vs Cassiopeia3.7%+3.7 pts
Best Zed Build vs Cassiopeia
Usual Zed build (Mid)
63.7% win rate · 171 games
Against Cassiopeia
Not enough matchup-specific build data: only 3 of 20 Zed games against Cassiopeia carried a complete build, which is too few to recommend an item path from. Use Zed's standard build instead.
- Zed usually completes Voltaic Cyclosword first, at 10.9 min (median of 23 games).
- Skill priority: Q > E > W — the same as usual.
Builds are ranked by the lower edge of their win rate range, not the raw win rate, so a build seen in a handful of wins never outranks a proven one.
Best Zed Runes vs Cassiopeia
Usual Zed runes (Mid)
First Strike
72.7% win rate · 44 games
Against Cassiopeia
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Zed draft in Draft Lab
Draft Lab lays out both teams lane by lane with live matchup win rates, damage profiles and game-phase lean, and suggests picks and bans from current meta data.
- Full 5v5 draft board
- Lane matchup win rates
- Pick and ban suggestions
Zed matchup data for League of Legends patch 26.19. The table below shows Zed's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Zed build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Zed Matchups
Hardest for Zed
Easiest for Zed
Win rate and games for each matchup. Lists are ranked by the edge of the 95% range so small samples cannot top them; matchups with at least 50 games only.
Help us maintain accuracy! If you notice incorrect stats, missing data, or any issues, your feedback directly improves the quality of our data for the entire community.
Zed vs Cassiopeia FAQ - Patch 26.19
Who wins Zed vs Cassiopeia?
Current data slightly favors Zed, but the sample is too limited for a strong conclusion: Zed wins 55.6% of 27 games (95% range 37.3–72.4%).
What is Zed's win rate against Cassiopeia?
Zed wins 55.6% of 27 Mid games against Cassiopeia on patch 26.19 (95% range 37.3–72.4%). Based on both champions' overall Mid win rates, 50.7% would be expected.
Does Zed counter Cassiopeia?
Not clearly. Zed wins 55.6% of 27 games against Cassiopeia, and the 95% range (37.3–72.4%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Zed or Cassiopeia?
There are not enough games with a 15-minute snapshot yet (27) to say who wins lane.
Does Zed outscale Cassiopeia?
There are too few games of each length to tell yet.
When is Cassiopeia strongest against Zed?
On current data there is no stage of the game where Cassiopeia is ahead of Zed beyond the margin of error.
What should Zed build against Cassiopeia?
There are not enough games for a matchup-specific core, so use Zed's usual Mid core: Voltaic Cyclosword, Axiom Arc, Edge of Night. The biggest change against Cassiopeia: Doran's Shield + Health Potion (5.3% usually, 18.5% here).
What runes should Zed use against Cassiopeia?
Use Zed's usual First Strike page (Inspiration + Precision); there are too few games for a matchup-specific page. The biggest change against Cassiopeia: Health Scaling (defense) (86.4% usually, 100.0% here).