Thermo-Alchemist is a uncommon Creature — Human Shaman card from Innistrad: Double Feature (DBL), collector number 164. Current market price: $0.89 (foil $23.34), TCGplayer market prices via Scryfall.
Defender {T}: This creature deals 1 damage to each opponent. Whenever you cast an instant or sorcery spell, untap this creature.