Professor Dellian Fel is a mythic Legendary Planeswalker — Dellian card from Secrets of Strixhaven (SOS), collector number 283. Current market price: $7.10 (foil $8.82), 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."