Metallic Mimic is a rare Artifact Creature — Shapeshifter card from Aether Revolt Promos (PAER), collector number 164s. Current market price: — (foil $11.41), TCGplayer market prices via Scryfall.
As this creature enters, choose a creature type. This creature is the chosen type in addition to its other types. Each other creature you control of the chosen type enters with an additional +1/+1 counter on it.