Tenured Inkcaster is a uncommon Creature — Vampire Warlock card from Strixhaven: School of Mages (STX), collector number 88. Current market price: $0.12 (foil $0.26), TCGplayer market prices via Scryfall.
When this creature enters, put a +1/+1 counter on target creature. Whenever a creature you control with a +1/+1 counter on it attacks, each opponent loses 1 life and you gain 1 life.