Nullpriest of Oblivion is a rare Creature — Vampire Cleric card from Foundations (FDN), collector number 611. Current market price: $0.22, TCGplayer market prices via Scryfall.
Kicker {3}{B} (You may pay an additional {3}{B} as you cast this spell.) Lifelink Menace (This creature can't be blocked except by two or more creatures.) When this creature enters, if it was kicked, return target creature card from your graveyard to the battlefield.