Eltarai, Servant of Hell

: Whenever you sacrifice a creature, proliferate, then proliferate again.
0: You may sacrifice a creature. If you do, return a creature card with mana value less than or equal to it's power from your graveyard to your hand.
-3: You gain an emblem with "At the beginning of your upkeep, exile a creature card from a graveyard. Create a token that is a copy of it."