Sarevok, Deathbringer is a uncommon Legendary Creature — Human Knight card from Commander Legends: Battle for Baldur's Gate (CLB), collector number 391. Current market price: $0.22 (foil $0.31), TCGplayer market prices via Scryfall.
At the beginning of each player's end step, if no permanents left the battlefield this turn, that player loses X life, where X is Sarevok's power. Choose a Background (You can have a Background as a second commander.)
All Commander Legends: Battle for Baldur's Gate cards and prices