Birthing Vat

Imprint — Whenever a nontoken creature dies, you may exile that card. If you do, return each other card exiled with this artifact to its owner's graveyard. , : Create a token that's a copy of a card exiled with this artifact. It gains haste. Exile it at the beginning of the next end step.

( can be paid with either or 2 life.) , , Sacrifice a creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery.