Leonin Corpse-Queller

First strike
Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
{4}{w}: Tap target creature. If that creature is a Zombie, it doesn't untap during its controller's untap step.
"I love the undead. When I slay them, I get the satisfaction of knowing they died twice!"