MacroMind matchup data — real ranked games, not opinions
Karthus vs Nunu
In Jungle, Karthus wins 43% against Nunu across 235 observed ranked games. This is an observed win rate shown with its sample size, not a prediction or a guaranteed counter.
By 15 minutes the median game has Karthus ahead by 582 gold.
Does Karthus counter Nunu?
No. This one runs the other way: Nunu takes 57% of 235 ranked Jungle games, and the gap clears the noise band.
How to beat Nunu as Karthus
Turn the early game into gold: 300 up at 10:00 runs this matchup at 49% over 153 games; 300 behind drops it to 30% over 82.
The median first death in this lane comes at 5:54; the level 6 spike lands around 6:47. Respect the all-in window until your spike is online.