Mimic Vat is a rare Artifact card from Scars of Mirrodin (SOM), collector number 175. Current market price: $1.06 (foil $7.72), TCGplayer market prices via Scryfall.
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. {3}, {T}: 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.