Pippa, Duchess of Dice is a rare Legendary Creature — Human Noble card from The List (Unfinity Foil Edition) (ULST), collector number 40. Current market price: — (foil $0.25), TCGplayer market prices via Scryfall.
{2}{G}, {T}: Roll a six-sided die. It becomes a green Die creature token with power and toughness each equal to its result. {2}{U}, {T}: Reroll any die. (Activate only any time it makes sense.)