Talk:Kog'Maw/@comment-24959866-20140519075222/@comment-8506165-20140521053650

Long story short: Kayle's kind of a weird one.

Righteous Fury is one of the few on-hit effects that does proc spell vamp - the only other two I can think of are both on : Empower and Grandmaster's Might. But almost no other on-hits have any interaction with spell vamp, regardless of whether they deal physical or magic damage. So yeah, Kog'Maw's actually the normal one, and Kayle's the odd one out, with a partner in Jax. Possibly because they're both old champs, or maybe Riot want someone other than to buy Hextech Gunblade every so often.