A Girl and Her Dogs is a rare Creature — Human card from Mystery Booster 2 (MB2), collector number 515. Current market price: $0.30, TCGplayer market prices via Scryfall.
When A Girl and Her Dogs enters the battlefield and at the beginning of your upkeep, create a 1/1 white legendary Dog creature token and name it. Whenever A Girl and Her Dogs attacks, it gets +1/+1 until end of turn for each legendary creature you control.