Sedgemoor Witch is a rare Creature — Human Warlock card from Strixhaven: School of Mages Promos (PSTX), collector number 86s. Current market price: — (foil $11.26), TCGplayer market prices via Scryfall.
Menace Ward—Pay 3 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3 life.) Magecraft — Whenever you cast or copy an instant or sorcery spell, create a 1/1 black and green Pest creature token with "When this token dies, you gain 1 life."