Bolbov, Bogking

Defender, Reach.
At the beginning of your upkeep, choose a creature. Whenever you or the chosen creature take damage this turn, put that many +1/+1 counters on Bolbov. Bolbov may have no more than six +1/+1 counters on him at once.
Remove two +1/+1 counters from Bolbov: Return target creature from your graveyard to the battlefield.