Ojutai Exemplars is a mythic Creature — Human Monk card from Dragons of Tarkir (DTK), collector number 27. Current market price: $0.47 (foil $0.98), TCGplayer market prices via Scryfall.
Whenever you cast a noncreature spell, choose one — • Tap target creature. • This creature gains first strike and lifelink until end of turn. • Exile this creature, then return it to the battlefield tapped under its owner's control.