Sage of the Skies is a rare Creature — Human Monk card from Tarkir: Dragonstorm Promos (PTDM), collector number 22p. Current market price: $0.32 (foil $0.27), TCGplayer market prices via Scryfall.
When you cast this spell, if you've cast another spell this turn, copy this spell. (The copy becomes a token.) Flying, lifelink