How are champion matchup win rates calculated?

Win rates are calculated from thousands of ranked games in Emerald+ elo on the current patch. Data is sourced from OP.GG and updated regularly.

What does a 55% win rate matchup mean?

A 55% win rate means Champion 1 wins 55 out of every 100 games against Champion 2 in ranked. Anything above 52% is considered a favorable matchup.

Do matchup win rates change every patch?

Yes. Champion buffs, nerfs, item changes, and meta shifts can all affect matchup win rates. Our data updates with each new patch.

Should I always pick the counter champion?

Not necessarily. Comfort and experience on a champion often matter more than counter-picking, especially below Diamond. A 2-3% win rate difference is easily overcome by champion mastery.

What rank is the matchup data from?

All matchup data is sourced from Emerald+ ranked games to ensure the data reflects skilled play. Lower elo matchups can differ significantly.

Patch 26.9 Data

Champion Matchups

Pick two champions and see who wins. Win rates, counters, and tips powered by live ranked data.

Champion 1

Cassiopeia

Champion 2

Orianna

51.0%

Cassiopeia win rate vs Orianna

Skill matchup — could go either way

286

Games Analyzed

51.0%

Cassiopeia WR

49.0%

Orianna WR

+83

Avg Gold Diff @15

Power Spike Timeline

Cassiopeia Level 2

Cassiopeia Level 6

Orianna Level 6

Orianna 1 item

Cassiopeia 2 items

Orianna 2 items

How to Play This Matchup

Power Curve

Cassiopeia is strongest late game while Orianna peaks mid game. Play around your power window.

MR Priority

Both deal magic damage. An early Null-Magic Mantle or Mercury's Treads can swing the lane. Hexdrinker is also an option for AD champs.

Exploit Orianna's Weakness

Orianna's main weakness: Assassins, losing ball position, immobile. Play around this to maximize your advantage.

Cassiopeia Win Condition

E spam DPS, R stun if facing, no boots = more AP

Orianna Win Condition

Ball control, R shockwave on grouped enemies, shield allies

Recommended Items

Cassiopeia

Archangel's Staff

Core

Build every game

Liandry's Anguish

Core

Build every game

Rabadon's

Core

Build every game

Mercury's Treads

Defensive

MR + tenacity vs Orianna's AP damage and CC

Banshee's Veil

Counter

Spell shield blocks Orianna's engage tool

Orianna

Luden's Tempest

Core

Build every game

Shadowflame

Core

Build every game

Rabadon's

Core

Build every game

Mercury's Treads

Defensive

MR + tenacity vs Cassiopeia's AP damage and CC

Banshee's Veil

Counter

Spell shield blocks Cassiopeia's engage tool

Cassiopeia's Worst Matchups

Orianna's Worst Matchups

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