Divining Witch is a rare Creature — Human Spellshaper card from Nemesis (NEM), collector number 57. Current market price: $0.84 (foil $28.45), TCGplayer market prices via Scryfall.
{1}{B}, {T}, Discard a card: Choose a card name. Exile the top six cards of your library, then reveal cards from the top of your library until you reveal a card with the chosen name. Put that card into your hand and exile all other cards revealed this way.