Grimgrin, Corpse-Born (Pudge)

Grimgrin, Corpse-Born enters the
battlefield tapped and doesn't untap during
your untap step.
Sacrifice another creature: Untap Grimgrin
and put a +1/+1 counter on it.
Whenever Grimgrin attacks, destroy target
creature defending player controls, then
put a +1/+1 counter on Grimgrin.