Jiang Yanggu, Wildcrafter is a uncommon Legendary Planeswalker — Yanggu card from Foundations Jumpstart (J25), collector number 677. Current market price: $0.32, TCGplayer market prices via Scryfall.
Each creature you control with a +1/+1 counter on it has "{T}: Add one mana of any color." −1: Put a +1/+1 counter on target creature.