Plague Reaver is a rare Creature — Beast card from Commander Legends (CMR), collector number 652. Current market price: $0.74 (foil $1.05), TCGplayer market prices via Scryfall.
At the beginning of your end step, sacrifice each other creature you control. Discard two cards, Sacrifice this creature: Choose target opponent. Return this creature to the battlefield under that player's control at the beginning of their next upkeep.