Crovax the Cursed

{2}{B}{B} · Legendary Creature — Vampire Noble

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.

Motor: se resuelve a mano

Rulings (3)

Crovax can sacrifice itself to its upkeep triggered ability.
Wizards of the Coast · 2004-10-04
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.
Wizards of the Coast · 2004-10-04
You can only sacrifice one creature to it each turn.
Wizards of the Coast · 2004-10-04