Wilt-Leaf Liege is a rare Creature — Elf Knight card from Modern Masters 2015 (MM2), collector number 200. Current market price: $0.58 (foil $2.41), TCGplayer market prices via Scryfall.
({G/W} can be paid with either {G} or {W}.) Other green creatures you control get +1/+1. Other white creatures you control get +1/+1. If a spell or ability an opponent controls causes you to discard this card, put it onto the battlefield instead of putting it into your graveyard.