Anafenza, Kin-Tree Spirit is a uncommon Legendary Creature — Spirit Soldier card from Commander Masters (CMM), collector number 11. Current market price: $0.26 (foil $0.36), TCGplayer market prices via Scryfall.
Whenever another nontoken creature you control enters, bolster 1. (Choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)