MacroMind matchup data: real ranked games, not opinions
Jayce vs Karthus
What is Jayce's win rate vs Karthus?
In Top, Jayce wins 35% against Karthus across 29 observed 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 Jayce ahead by 102 gold.
Jayce at 15:00
- Gold: +102
- CS: +6
- XP: +536
Typical gap to Karthus, from 29 games that reached 15:00.
How to beat Karthus as Jayce
The median first death in this lane comes at 3:50; the level 6 spike lands around 5:42. Respect the all-in window until your spike is online.
What does Jayce build in Top?
The most-finished Jayce core is Youmuu's Ghostblade, Manamune, Serylda's Grudge: 55.0% across 2,411 games when all three got done. All matchups, patches 26.1-26.12.
Most games start Doran's Blade + Health Potion; the first finished item is usually Youmuu's Ghostblade (10,943 games).
Skill plan: Jayce players max Q first and take Q at level 1.