Caitlyn vs Karthus Counter Pick

Caitlyn’s 650-range basic attacks and Piltover Peacemaker usually let her out-poke an opponent before they can respond, but that edge barely registers here: the matchup sits at 43.5% across 520 games on patch 16.13.1, a losing pairing by any normal standard. Karthus fights from 450 range with Lay Waste, a delayed blast that deals extra damage to isolated targets, which punishes a Caitlyn who has to walk up alone to land a trap or line up a headshot.

The real swing happens at level 6. Requiem deals damage to every enemy champion regardless of position after a 3-second channel, so stepping behind minions does not remove Caitlyn from the fight the way it would against a normal opponent. Karthus is also dangerous even after dying, since Death Defied lets him keep casting spells for several seconds at zero health. Caitlyn’s 106.9 armor at level 18 comfortably out-scales Karthus’s 46 base attack damage in a straight fight, so the losses here are mostly about mana pressure and poke uptime rather than raw stats. Wall of Pain adds another layer, reducing move speed and magic resist for anyone who walks through it, which can slow Caitlyn’s repositioning at the exact moment she needs to reset a trap. Karthus’s 335 move speed also edges Caitlyn’s base 325, denying her the easy disengage this matchup otherwise calls for. See the full kits on the Caitlyn and Karthus champion pages before locking in.