Galvanoth is a rare Creature — Beast card from Mirrodin Besieged (MBS), collector number 62. Current market price: $0.42 (foil $0.61), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, you may look at the top card of your library. You may cast it without paying its mana cost if it's an instant or sorcery spell.