Sanguine Evangelist is a rare Creature — Vampire Cleric card from The Lost Caverns of Ixalan (LCI), collector number 34. Current market price: $0.35 (foil $0.37), TCGplayer market prices via Scryfall.
Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.) When this creature enters or dies, create a 1/1 black Bat creature token with flying.