Crovax the Cursed is a rare Legendary Creature — Vampire Noble card from Stronghold (STH), collector number 55. Current market price: $0.95, TCGplayer market prices via Scryfall.
Crovax enters 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.