Wolverine of the X-Men

When Wolverine of the X-Men enters the battlefield, target player sacrifices a creature.
Whenever a player sacrifices a creature, put a +1/+1 counter on Wolverine of the X-Men.
{b}{b}, Sacrifice another creature you control: Regenerate Wolverine of the X-Men. (The next time this creature would be destroyed this turn, it isn't. Instead, tap it, remove all damage from it, and remove it from combat.)