Bess, Soul Nourisher is a rare Legendary Creature — Human Citizen card from New Capenna Commander (NCC), collector number 67. Current market price: $2.13, TCGplayer market prices via Scryfall.
Whenever one or more other creatures you control with base power and toughness 1/1 enter, put a +1/+1 counter on Bess. Whenever Bess attacks, each other creature you control with base power and toughness 1/1 gets +X/+X until end of turn, where X is the number of +1/+1 counters on Bess.