Ukava, Rakdos Bone Witch

Whenever another creature you control that was dealt combat damage this turn dies, if it had a +1/+1 counter on it, return it to the battlefield under your control with two -1/-1 counters on it. It's a Skeleton in addition to its other types.
"Exava and I get along... well. When she's had her fill of blood, I'm allowed the bones."