User blog comment:KaiserLos24/Zeus, the Lord of Thunder (If DoTA has him, then LoL should have him too)/@comment-5663427-20140526182220/@comment-7709681-20140527150751

@Cie Qyu: Slark - Passive attribute steal, semi-spammable AoE damage with cleanse, that god forsaken leap, active "invisibility" (The stealth is just visual, you just become untargetable and can still move, attack, cast spells and use items) and passive movement speed plus health regen equal to his max. health (When out of the enemy team's sight).

I don't believe it deals as much damage as Fizz, but believe it, is MUCH MORE annoying.