Sage-Eye Avengers is a rare Creature — Djinn Monk card from Duel Decks: Mind vs. Might (DDS), collector number 8. Current market price: $0.10, TCGplayer market prices via Scryfall.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever this creature attacks, you may return target creature to its owner's hand if its power is less than this creature's power.