Jenny Flint is a rare Legendary Creature — Human Detective card from Doctor Who (WHO), collector number 420. Current market price: $0.32 (foil $0.51), TCGplayer market prices via Scryfall.
Partner with Madame Vastra First strike Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.) Whenever you sacrifice a Clue or Food, put a +1/+1 counter on another target creature you control.