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
Karthus
VS
Champion 2
Ahri
vs
44.2%
Karthus win rate vs Ahri
Ahri hard counters Karthus
104
Games Analyzed
44.2%
Karthus WR
55.8%
Ahri WR
-461
Avg Gold Diff @15
Karthus
DamageAP
StyleSustained
RangeRanged
Difficulty**---
StrongLate game
RunesDark Harvest / Inspiration
SummsFlash + Smite
Ahri
DamageAP
StyleBurst
RangeRanged
Difficulty**---
StrongMid game
RunesElectrocute / Inspiration
SummsFlash + Ignite
Power Spike Timeline
Karthus
Level 6
Ahri
Level 6
Karthus
1 item
Ahri
1 item
Ahri
2 items
Karthus
3 items
How to Play This Matchup
Power Curve
Karthus is strongest late game while Ahri 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.
Sustained vs Burst
Ahri wants to combo and disengage. Karthus wins extended trades. Don't let Ahri get a clean rotation  force long fights where sustain wins.
Exploit Karthus's Weakness
Karthus's main weakness: Invaded early, immobile, Zhonya's blocks R. Play around this to maximize your advantage.
Karthus Win Condition
R global damage, passive keeps dealing damage after death
Ahri Win Condition
Roam with R, pick off squishies with charm combo
Recommended Items
Karthus
Liandry's Anguish
Core
Build every game
Shadowflame
Core
Build every game
Rabadon's
Core
Build every game
Mercury's Treads
Defensive
MR + tenacity vs Ahri's AP damage and CC
Banshee's Veil
Counter
Spell shield blocks Ahri's engage tool
Zhonya's Hourglass
Counter
Stasis to survive assassin burst
Ahri
Malignance
Core
Build every game
Shadowflame
Core
Build every game
Rabadon's
Core
Build every game
Mercury's Treads
Defensive
MR + tenacity vs Karthus's AP damage and CC
Banshee's Veil
Counter
Spell shield blocks Karthus's engage tool
Ahri's Worst Matchups
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