Talk:Karthus/@comment-24630289-20140602065426/@comment-15244341-20140602105502

The skill is poorly worded. With: " Karthus surrounds himself with the souls of his victims, draining his mana to deal magic damage to enemies in range each second." it means Karthus' mana is the one spent, not his enemies' mana. Then, he gets mana when he kills something, like a Doran's Ring passive does. He doesn't use the enemies mana to deal damage with E or steals it.