Professor Dellian Fel is a mythic Legendary Planeswalker — Dellian card from Secrets of Strixhaven Promos (PSOS), collector number 214p. Current market price: $4.68 (foil $7.95), TCGplayer market prices via Scryfall.
+2: You gain 3 life. 0: You draw a card and lose 1 life. −3: Destroy target creature. −6: You get an emblem with "Whenever you gain life, target opponent loses that much life."