Rodolf Duskbringer is a rare Legendary Creature — Vampire Angel card from Foundations Jumpstart (J25), collector number 482. Current market price: $4.05, TCGplayer market prices via Scryfall.
Flying, deathtouch, lifelink Whenever you gain life, Rodolf Duskbringer gains indestructible until end of turn. At the beginning of your end step, you may pay {1}{W/B}. When you do, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn.