Genku, Future Shaper is a rare Legendary Creature — Moonfolk Wizard card from Modern Horizons 3 (MH3), collector number 373. Current market price: $0.28 (foil $0.42), TCGplayer market prices via Scryfall.
Whenever another nontoken permanent you control leaves the battlefield, choose one that hasn't been chosen this turn. Create a creature token with those characteristics. • 2/2 white Fox with vigilance. • 1/2 blue Moonfolk with flying. • 1/1 black Rat with lifelink. {3}{W}{U}: Put a +1/+1 counter on each creature you control.