Ricardio, Heart of Evil

When Ricardio, Heart of Evil enters the battlefield, you may sacrifice a creature. When
you do, Ricardio deals damage equal to the sacrificed creatures power to any target.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its
owner's control with a -1/-1 counter on it.)
"I'll rip out Princess Bubblegum's heart and make out
with it."