Mimic Vat

Imprint - Whenever a nontoken creature
dies, you may exile that card. If you do, return
each other card exiled with Mimic Vat to their
owner's graveyard.

{3}, {t}: Create a token that's a copy of a card
exiled with Mimic Vat. It gains haste.
Exile it at the beginning of the next endstep.