Crow Scarecrow

At the beginning of your upkeep, if this card is untapped, you may create a 1/1 black crow token with deathtouch.
{x}{t}: Create {x} 1/1 black crow tokens with deathtouch, once this resolves, this card is then exiled from the game.
Whenever you sacrifice a crow, Crow Scarecrow gets a +1/+1 counter put on it.
Here comes a Murder.