MacroMind matchup data — real ranked games, not opinions
Nunu vs Karthus
In Jungle, Nunu wins 57% against Karthus 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 Nunu behind by 582 gold.
Does Nunu counter Karthus?
Yes by the numbers. Nunu wins 57% of 235 ranked Jungle games into Karthus, and the gap clears the noise band on this sample.
How to beat Karthus as Nunu
Turn the early game into gold: 300 up at 10:00 runs this matchup at 70% over 82 games; 300 behind drops it to 51% over 153.
The median first death in this lane comes at 7:09; the level 6 spike lands around 7:13. Respect the all-in window until your spike is online.