Mind Meanderer is a uncommon Creature — Bird Fish Illusion card from Reality Fracture (FRA), collector number 141. Current market price: $0.11 (foil $0.22), TCGplayer market prices via Scryfall.
Flying This creature has vigilance as long as you control a Jace planeswalker. When this creature enters, it fights up to one target creature an opponent controls. (Each deals damage equal to its power to the other.)