Karthus Build
Bot Tier 1Patch 26.21 · Silver+ · 4,143 gamesUpdated
Who counters Karthus
Swain39.7%63 games · 26.20
Ziggs45.3%95 games · 26.20
Sivir45.8%107 games
Smolder46.2%93 games
Yunara49.2%197 games
How to build Karthus
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Sorcerer's Shoes → Blackfire Torch → Shadowflame → Rabadon's Deathcap
31% of games
Exhaust + Flash83%
Doran's Ring, Health Potion, Health PotionBest supports for Karthus
Who Karthus has the best record alongside in the bot lane this patch.
Each pairing is weighed by the games behind it, so a lucky handful cannot top either list.
Pairings are only half a team. Team Comp Tuesdays builds full five-champion compositions around picks like this.
Want the written version? Our Counter Series breaks down how to actually play against champions like this, not just who wins on paper.
Recent games
Taken from as high up the ladder as this pick gets played. All 10 games from Master and above.
B Karthus+
S Rellvs
B Kai'Sa+
S LeonaBuild
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Spells & runes
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Skills
B Karthus+
S Miliovs
B Jhin+
S BardBuild
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Spells & runes
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Skills
B Karthus+S Leonavs
B Ezreal+
S AlistarBuild
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Spells & runes
|Skills
B Karthus+S Rellvs
B Xayah+S AlistarBuild
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|Skills
B Karthus+
S SennavsB Kai'Sa+
S PykeBuild
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|Skills
B Karthus+
S Nautilusvs
B Jinx+
S ThreshBuild
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Skills
B Karthus+S SennavsB Jhin+
S BrandBuild
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Spells & runes
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Skills
B Karthus+
S Vel'Kozvs
B Kalista+
S Renata GlascBuild
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|Skills
B Karthus+S Bardvs
B Zeri+
S PantheonBuild
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Skills
B Karthus+
S Trundlevs
B Heimerdinger+S LeonaBuild
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Skills
Runes
The full page most players run, not just the keystone.
Summoner spells and early items
What people bring, and which ability they max first.
- Exhaust + Flash83%54.0%3,484 games
Flash + Teleport7%49.8%289 games
Boots and the other slot items that do not count as finished items in the full build below.
93%6%1%Karthus build
The items players finish, in the order they end up in the inventory.
- 1st
- 2nd
- 3rd
Every slot, boots and full builds
Slot by slot
Boots
Sorcerer's Shoes92% · 53.4% win rate
Boots5% · 51.3% win rate
No boots1% · 34.6% win rate
Most common full builds
- ›+6% of games · 48.8% win rate · 242 games
- ››+4% of games · 60.7% win rate · 163 games
- +3% of games · 45.9% win rate · 146 games
- ››+3% of games · 53.5% win rate · 142 games
- ›+2% of games · 47.5% win rate · 80 games
Where these numbers come from
We read finished ranked solo queue games directly from Riot and keep a running tally. Nothing is copied from another site.
Matchups compare Karthus against the enemy champion in the same lane, counting only games where both were actually there. The counters list pulls each matchup toward Karthus's own win rate by 180 games' worth of it, then keeps the ones still under 50%. A matchup seen thirty times barely moves off the champion's average, and one seen a thousand times keeps close to its own number. The best and worst supports are ranked the same way, against Karthus's average instead of 50%.
Every number here is followed by the games behind it, because that's what tells you how much to trust it. A win rate over a few hundred games is worth reading. The same number over thirty is mostly luck.
Recent games show what was built and who won. They never show who played. Rank is grouped (Master and up is one band), game length is rounded to five minutes, and there's no region or date on a card.
Every ranked game we read this patch adds its finished items here, boots aside. Items are listed in the order they sit in the inventory, which isn't always the order they were bought: a finished item takes the slot its first part was in.
Compare a win rate only with the other picks in its own slot. A fifth item mostly shows up in long games, and those skew toward the team that was already ahead, so late slots run hot whatever sits in them. A row needs 30 games before it shows up at all.