Blood Poet is a rare Creature — Vampire Cleric card from Mystery Booster Playtest Cards 2021 (CMB2), collector number 34. Current market price: $0.28, TCGplayer market prices via Scryfall.
Spark (Activate spark abilities by spending or giving yourself spark counters. Activate only one spark ability per turn, and only as a sorcery.) +1: Blood Poet gains lifelink until end of turn. −3: Target opponent discards a card. You gain life equal to its converted mana cost.