Wolverine, Best There Is

Unrivaled Lethality — Double all damage Wolverine would deal.
At the beginning of each end step, if
Wolverine dealt damage to another creature
this turn, put a +1/+1 counter on him.
{1}{g}: Regenerate Wolverine. (The next time
he would be destroyed this turn, instead tap
him, remove him from combat, and heal all damage on him.)