Talk:Karthus/@comment-5016083-20120413173310/@comment-3546228-20120416164322

Rylai's is a VERY powerful item on Karthus, because it makes landing chain Q's easy as pie, and letting you kill champions that would escape in other cases. Having Rylai's also allows you to drop and buy  for mana instead. Riskier early game, but it's worth it in the end.