Crovax the Cursed [Stronghold]

Set: Stronghold Type: Legendary Creature — Vampire Noble Rarity: Rare Cost: {2}{B}{B} Crovax the Cursed enters the battlefield with four +1/+1 counters on it.At the beginning of your upkeep, you may sacrifice a creature. If you do, put a +1/+1 counter on Crovax. If you don't, remove a +1/+1 counter from Crovax.{B}: Crovax gains flying until end of turn.