MacroMind matchup data — real ranked games, not opinions
Jayce vs Kayn
How often does Jayce beat Kayn in Jungle?
Jayce into Kayn in Jungle: 51% observed win rate across 883 ranked games. Counted from real matches, and every number here shows its sample size.
By 15 minutes the median game has Jayce ahead by 661 gold.
Does Jayce counter Kayn?
Too close for a counter call: Jayce sits at 51% over 883 games, inside the noise band. On this sample neither pick counters the other — the swing lives in the conditions below, so play the side you know better.
Beating Kayn: the Jayce game plan
A 300-gold lead at 10:00 puts Jayce at 59% across 575 games. Flip the lead and Jayce falls to 36% across 308.
| The spot | Win rate | Games |
|---|---|---|
| 300 gold up at 10:00 | 59% | 575 |
| 300 gold down at 10:00 | 36% | 308 |
| First blood | 58% | 493 |
| +kills at 10:00 | 61% | 393 |
| +CS at 10:00 | 59% | 488 |
| 0 deaths at 10:00 | 59% | 214 |
| 0 deaths at 15:00 | 73% | 89 |
Someone usually dies here around 5:34 in the median game, and level 6 lands near 6:59. Until your spike is online, respect the all-in.
Jayce's Jungle build, with receipts
Into Kayn specifically, Jayce finishes Youmuu's Ghostblade first most often: 49.8% over 321 games of this matchup.
The most-finished core in this exact matchup is Youmuu's Ghostblade, Opportunity, Edge of Night: 50.0% across 92 games.
The most-finished Jayce core is Youmuu's Ghostblade, Opportunity, Edge of Night: 52.3% across 3,541 games when all three got done. All matchups, patches 16.1-16.12.
Most games start Scorchclaw Pup + Health Potion; the first finished item is usually Youmuu's Ghostblade (14,088 games).
Skill plan: Jayce players max Q first and take Q at level 1.