Manifestation Sage is a rare Creature — Human Wizard card from Strixhaven: School of Mages (STX), collector number 347. Current market price: $0.33 (foil $0.35), TCGplayer market prices via Scryfall.
When this creature enters, create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is the number of cards in your hand.