MacroMind matchup data: real ranked games, not opinions
Karthus vs Kayn
How often does Karthus beat Kayn in Jungle?
Karthus into Kayn in Jungle: 51% observed win rate across 793 ranked games.
Global ranked sample: games from every region and every rank pooled together, not one server's stats. Data runs through patch 26.12; curves updated 2026-08-07.
By 15 minutes the median game has Karthus ahead by 215 gold.
Karthus at 15:00
- Gold: +215
- CS: +15
- XP: +639
Typical gap to Kayn, from 785 games that reached 15:00.
Does Karthus counter Kayn?
No counter here: Karthus sits at 51% over 793 games. The swing lives in the spots below, so play the side you know better and chase the row that moves the number the most in this lane, then hold that lead through the first back.
Beating Kayn: the Karthus game plan
A gold lead at 10:00 puts Karthus at 60% across 460 games. Flip the lead and Karthus falls to 39% across 332.
| The spot | Win rate | Games |
|---|---|---|
| Ahead in gold at 10:00 | 60% | 460 |
| Behind in gold at 10:00 | 39% | 332 |
| First blood | 59% | 356 |
| +kills at 10:00 | 62% | 299 |
| +CS at 10:00 | 56% | 565 |
| 0 deaths at 10:00 | 69% | 135 |
| 0 deaths at 15:00 | 72% | 54 |
Someone usually dies here around 4:28 in the median game, and level 6 lands near 6:56. Until your spike is online, respect the all-in.
Karthus's Jungle build, with receipts
Into Kayn specifically, Karthus finishes Blackfire Torch first most often: 53.7% over 272 games of this matchup.
The most-finished core in this exact matchup is Blackfire Torch, Shadowflame, Rabadon's Deathcap: 69.6% across 56 games.
The most-finished Karthus core is Blackfire Torch, Shadowflame, Rabadon's Deathcap: 53.6% across 1,882 games when all three got done. All matchups, patches 26.1-26.12.
Most games start Scorchclaw Pup + Health Potion; the first finished item is usually Blackfire Torch (8,818 games).
Skill plan: Karthus players max Q first and take Q at level 1.