Karthus vs Naafiri Counter Pick
Matchup Summary
What the Data Means
Karthus is a mage, Naafiri a assassin/fighter hybrid, and they meet in the jungle. 504 tracked games on 16.13.1 put Karthus at a 43.1% win rate into Naafiri. That is 6.9 points under even, which is why Naafiri is listed among the champions Karthus struggles into.
Karthus looks for Defile (E); Naafiri answers with Darkin Daggers (Q). Whoever spends Requiem or Hounds’ Pursuit first hands the other a window.
Mismatched profiles here: magic on Karthus’s side, physical on Naafiri’s. Starting health splits 620 to 610 in Karthus’s favour, with armour at 21 against 28. Naafiri starts 7 armour ahead, which is felt before either buys anything. By level 18 that becomes 2490 health and 101 armour for Karthus against 2395 and 99 for Naafiri. On autos alone the numbers read 46 AD for Karthus and 55 for Naafiri. Karthus walks at 335 and Naafiri at 340, so Naafiri dodges skillshots a fraction easier.
Range decides much of the early game: Karthus attacks from 450 units, Naafiri from 125. The burden is on Naafiri: Karthus has no reason to walk into an even fight.
Riot scores Karthus at 7/10 for difficulty against 2/10, and that gap alone drags on the average. The Karthus versus Naafiri numbers rebuild from current Emerald and above games.
FAQ
No — current data marks this as a counter matchup: Naafiri has the statistical edge. Karthus wins 43.1% of the recorded games.
43.1% from Karthus's perspective, measured on patch 16.13.1.
504 ranked games at Emerald rank and above, across all regions.
The current Karthus build — items, runes and skill order from the same data set — is on the Karthus build page.