Gluetius Maximus is a uncommon Creature — Beast card from Unhinged (UNH), collector number 98. Current market price: $0.23 (foil $1.14), TCGplayer market prices via Scryfall.
As this creature enters, an opponent chooses one of your fingers. (Thumbs are fingers, too.) When the chosen finger isn't touching this creature, sacrifice this creature.