Entrails Feaster

At the beginning of your upkeep, sacrifice this creature unless you exile the top creature card of your graveyard.

At the beginning of your upkeep, tap this creature unless you pay 1 life.

Flying

You may discard this card any time you could cast an instant.

At the beginning of your upkeep, sacrifice this creature unless you exile the top creature card of your graveyard.

This creature can't block.

At the beginning of your upkeep, put a +1/+1 counter on this creature and you lose 1 life.

This creature enters with a +1/+1 counter on it.

At the beginning of your upkeep, you may put a +1/+1 counter on this creature.

When this creature attacks or blocks, destroy it at end of combat.

When this creature enters, mill three cards. (Put the top three cards of your library into your graveyard.)

When this creature dies, you may exile it. When you do, put target creature card from your graveyard on top of your library.