Hylda of the Icy Crown is a mythic Legendary Creature — Human Warlock card from Wilds of Eldraine Promos (PWOE), collector number 206p. Current market price: $7.86 (foil $4.13), TCGplayer market prices via Scryfall.
Whenever you tap an untapped creature an opponent controls, you may pay {1}. When you do, choose one — • Create a 4/4 white and blue Elemental creature token. • Put a +1/+1 counter on each creature you control. • Scry 2, then draw a card.