MacroMind matchup data — real ranked games, not opinions
Xerath vs Karthus
How often does Xerath beat Karthus in ADC?
Xerath into Karthus in ADC: 53% observed win rate across 38 ranked games. Counted from real matches, and every number here shows its sample size.
By 15 minutes the median game has Xerath ahead by 174 gold.
Beating Karthus: the Xerath game plan
Someone usually dies here around 6:08 in the median game, and level 6 lands near 7:07. Until your spike is online, respect the all-in.
Xerath's ADC build, with receipts
The most-finished Xerath core is Luden's Echo, Shadowflame, Rabadon's Deathcap: 55.3% across 590 games when all three got done. All matchups, patches 16.1-16.12.
Most games start Doran's Ring + Health Potion + Health Potion; the first finished item is usually Luden's Echo (2,793 games).
Skill plan: Xerath players max Q first and take Q at level 1.