Crovax the Cursed

Legendary Creature - Vampire 0/0, 2BB (4)
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.¹
Illus. Pete Venters

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: Crovax can sacrifice itself to its upkeep triggered ability.
• 10/4/2004: You can only sacrifice one creature to it each turn.
• 10/4/2004: If you choose not to sacrifice a creature and he has no +1/+1 counters, then nothing bad happens. Note that some other effect must be keeping him alive if he has no counters.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Stronghold (Rare)