Multi-Headed is a common Creature — Hydra card from Unstable (UST), collector number 117. Current market price: $0.12 (foil $0.57), TCGplayer market prices via Scryfall.
At the beginning of each end step, if you rolled a die this turn, Augment {4}{G} ({4}{G}, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)