Excise the Imperfect is a rare Instant card from March of the Machine Commander (MOC), collector number 14. Current market price: $0.43, TCGplayer market prices via Scryfall.
Exile target nonland permanent. Its controller incubates X, where X is its mana value. (They create an Incubator token with X +1/+1 counters on it and "{2}: Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)