Mimic Vat

Imprint — Whenever a nontoken creature is put
into a graveyard from the battlefield, you may
exile that card. If you do return each other card
exiled with Mimic Vat to its owner's graveyard.
{3}, {t}: Create a token that's a copy of the exiled
card. It gains haste. Exile it at the beginning of
the next end step.