Taigam, Ojutai Master is a rare Legendary Creature — Human Monk card from Commander 2017 (C17), collector number 46. Current market price: $0.59, TCGplayer market prices via Scryfall.
Instant, sorcery, and Dragon spells you control can't be countered. Whenever you cast an instant or sorcery spell from your hand, if Taigam attacked this turn, that spell gains rebound. (Exile the spell as it resolves. At the beginning of your next upkeep, you may cast that card from exile without paying its mana cost.)