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
Zac
vs

51.2%
Karthus win rate vs Zac
Skill matchup — could go either way
129
Games Analyzed
51.2%
Karthus WR
48.8%
Zac WR
+92
Avg Gold Diff @15
Karthus
DamageAP
StyleSustained
RangeRanged
Difficulty**---
StrongLate game
RunesDark Harvest / Inspiration
SummsFlash + Smite
Zac
DamageAP
StyleAll-in
RangeMelee
Difficulty**---
StrongMid game
RunesAftershock / Inspiration
SummsFlash + Smite
Power Spike Timeline
Zac
Level 3
Karthus
Level 6
Zac
Level 6
Karthus
1 item
Zac
2 items
Karthus
3 items
How to Play This Matchup
Power Curve
Karthus is strongest late game while Zac 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.
Range Advantage
Karthus has range advantage. Zac should look for short trades when Karthus uses abilities on the wave. Freeze near your tower and wait for jungle help or an all-in window.
Exploit Zac's Weakness
Zac's main weakness: Grievous wounds, burst before blobs, invades early. Play around this to maximize your advantage.
Karthus Win Condition
R global damage, passive keeps dealing damage after death
Zac Win Condition
Long-range E engage, R displacement, blob passive revive
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 Zac's AP damage and CC

Banshee's Veil
Counter
Spell shield blocks Zac's engage tool
Zac
Sunfire Aegis
Core
Build every game

Spirit Visage
Core
Build every game

Thornmail
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
Karthus's Worst Matchups
Zac's Worst Matchups
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