BMO, the Special MO

Whenever BMO, the Special MO deals damage, put an experience counter on it.
{x}{t}: Remove X experience counters from BMO, the Special MO, put X +1/+1 counters minus 1 on BMO. Activate this ability once per turn.
When BMO, the Special MO dies, search your deck for a copy of this card, and put it in your hand.