Avkraxx, Hunter Lashen

This spell cannot be countered
Deathtouch, flying
Avkraxx, Hunter Lashen will attack every turn.
When any creature that an opponent controls dies, sacrifice creatures equal to the amount of treasure tokens on the battlefield and create a treasure token. If you have no creatures other than Avkraxx left to sacrifice, you lose the game.
while most predators would have been fed for a month, Avkraxx was hardly hunting for food.