Cassiopeia
Hardest matchups for Cassiopeia in Mid (Emerald, patch 16.20): 
Ekko, 
Ahri, 
Hwei. Easiest: 
Ryze, 
Mel, 
Lux.
Try it in a draftCountersPower curvesIn the tier listWho wins into CassiopeiaOn the pro tier list
Cassiopeia on patch 16.22
- Mid47.5%#81 of 91C3,980 games
- Top51.2%#33 of 103B1,065 games
- steady since 16.21
Cassiopeia’s main role on patch 16.22 is Mid: a 47.5% win rate across 3,980 Emerald games, #81 of 91 Mid champions on the tier list (grade C), picked in 1.6% of games. Cassiopeia is also played Top: a 51.2% win rate across 1,065 games, #33 of 103. Since patch 16.21, Cassiopeia Mid has not moved by more than chance explains: 0.2 points across 27,025 games in 8 ranks.
Emerald games from every region, as of Nov 9, 2026. The tables below load current numbers. Patch 16.22 tier list
Solo queue
Open in the tier listPatch 16.20, the current one
| Lane | Grade | Win rate | Games | Picked | Mains |
|---|---|---|---|---|---|
| Mid60% of its games | C | 47.9%47.6% raw ±1.1 | 7,725 | 1.1%1.4% banned | 51.3%47.1% first time |
| Top25% of its games | B | 49.7%49.6% raw ±1.7 | 3,168 | 0.5%1.4% banned | 52.1%45.6% first time |
| Bot14% of its games | C | 47.8%46.6% raw ±2.3 | 1,793 | 0.3%1.4% banned | 49.3%46.8% first time |
| Support1% of its games | too few games | 48.3%36.7% raw ±8.3 | 139 | 0.0%1.4% banned | 51.1%48.1% first time |
| Jungle0% of its games | too few games | 50.1%58.8% raw ±23.8 | 17 | 0.0%1.4% banned | 51.4%47.2% first time |
Matchups
Every matchupHow to read this
Cassiopeia’s win rate against each champion picked into it in the lane opposite: its hardest matchups, then its easiest. The small number is the matchup’s own effect on Cassiopeia, the part not explained by either champion’s strength.
Hardest for Cassiopeia
Lane leads and team bans
What Cassiopeia’s team bans
Champions a team bans more often when it has Cassiopeia than the other team does in the same games (63,536 games). The other team banned before Cassiopeia was picked, so the gap is the ban spent because Cassiopeia was coming — a sign players see these as counters. Riot does not say which player cast a ban, so this is the team’s choice.
Builds
Every buildHow to read this
How Cassiopeia is built in this lane, most common first, with the items those builds finish and how they win.
- Mana stack
49.4%6,426 games - AP sustained
50.7%1,421 games - AP burst
49.8%25 games - Enchanter
49.8%1 games
Runes and summoner spells
How to read this
How Cassiopeia does with each summoner-spell pair, keystone and minor rune in this lane, at the rank and region above. These are the win rates of the players who made each choice, not the choice’s own effect: a page is recommended only when a real share of players runs it.
8,619 games · patches 16.20, 16.21 · Sep 10 – Oct 21
Flash + Teleport47.1% · 4,684 games
ConquerorPrecision + Sorcery · 46.7%
Presence of Mind · Legend: Haste · Last Stand · Manaflow Band · TranscendenceShards: Adaptive Force · Move Speed · Health
Start: Doran's Ring + Health Potion · 49.8%
Key items: Rod of Ages → Archangel's Staff · 49.4%
Boots: Boots of Swiftness · 49.2%Every option, with its numbers
Summoner spells
Flash + Ignite46.1%727 games · 8.4% pick rate · same players: +2.2 pts vs the usualRare: not recommended- Flash + Teleport47.1%4,684 games · 54% pick rate · the usual choiceRecommended
Flash + Ghost48.0%1,668 games · 19% pick rate · same players: −0.1 pts vs the usual
Exhaust + Flash49.3%1,186 games · 14% pick rate · same players: −0.2 pts vs the usual
Keystones
- Conqueror + Sorcery46.7%1,561 games · 18% pick rate · same players: +1.3 pts vs the usualRecommended
Deathfire Touch + Resolve53.2%314 games · 3.6% pick rate · same players: +0.3 pts vs the usualRare: not recommended
Deathfire Touch + Precision47.5%5,663 games · 66% pick rate · the usual choice
Stormraider's Surge + Precision43.7%738 games · 8.6% pick rate · same players: −0.6 pts vs the usualRare: not recommended
Minor runes with Conqueror
- Presence of Mind47.0%99% take it
- Legend: Haste47.2%99% take it
- Last Stand46.6%84% take it
Cut Down49.6%8.6% take it
Coup de Grace47.3%7.1% take it
- Manaflow Band46.5%95% take it
- Transcendence46.8%88% take it
Celerity44.9%8.0% take it
Scorch51.2%4.7% take it
Gathering Storm47.2%2.7% take it
- Adaptive Force47.1%91% take it
- Ability Haste50.3%7.8% take it
- Move Speed48.9%17% take it
- Adaptive Force47.1%83% take it
- Health47.4%23% take it
- Health Scaling47.3%75% take it
These numbers describe, they do not prove. Each rate is Cassiopeia’s record when its player chose that option, pulled toward Cassiopeia’s own rate by 100 games of prior so a small sample cannot look like a discovery. An uncommon page often wins more because experts run it, and they would win on any page, so only a choice taken in at least 10% of games can be recommended, and spells and keystones are ranked by how the SAME players do with them against the usual choice, not by the raw rate; rarer ones are listed with their numbers and labeled. The build line (opening buy, the two key items in the order they are finished, boots or the support upgrade) is advice in the same sense: how Cassiopeia does when built that way.
The learning curve
Champion pool
On a first game Cassiopeia wins 45.0%; in the hands of players with the most mastery on it, 51.6%. That gap ranks it 48 of 173 for how much practice pays. It crosses 50% at about 180K mastery points.
Pro play
On the pro tier list
Cassiopeia in the major leagues and international events this season, across 3,434 games: its record, how often it is picked or banned, whether it is taken blind or saved as a counter, its lane at 15 minutes, and the best pro on it.
| Lane | Win rate | Priority | Blind / counter | Lane @15 | Best pro |
|---|---|---|---|---|---|
| Mid | 53.0%203W 162L | 35%38% in any lane | 40% counter | +163 gold | — |
| Bot | 50.6%16W 12L | 3%38% in any lane | 18% counter | −74 gold | — |
| Top | 49.8%2W 3L | 1%38% in any lane | 80% counter | −395 gold | — |
How much knowing Cassiopeia pays
Players on their Mastery band win 6.7 points more on Cassiopeia than first-timers do: #48 of 173 champions for how much mastery pays.
At 300k+ mastery points, Cassiopeia players win 51.6%: #127 of 173 champions for where mastery ends up. The curve is still rising there: its fitted ceiling of about 53.1% lies beyond the data and is an estimate, not a measurement.
CassiopeiaDots are the six mastery bands, placed at their mastery points. The line is the best-fitting curve that rises and levels off.
This is not a promise about your next game. Players do not reach a mastery band in a random order, and a champion someone loses on tends to get dropped before it reaches the high bands — so the right-hand side of every curve is partly survivors, not only practice.
Text summary of this page as it stood on Nov 9, 2026. The live tables on this page are current.
Cassiopeia ranked-play summary
Most similar champions: Aurora, Anivia, Vladimir.
Anonymous public figures recorded on Nov 9, 2026, when this page was built. The interactive tables on this page load current data.