Impounding Lot-Bot is a common Artifact Creature — Robot card from Unfinity (UNF), collector number 14. Current market price: $0.06 (foil $0.08), TCGplayer market prices via Scryfall.
When this creature enters, you may say "INCARCERATE!" in a robot voice. If you do, exile another target artifact or enchantment until this creature leaves the battlefield.