Teneb, the Harvester is a rare Legendary Creature — Dragon card from Planar Chaos (PLC), collector number 163. Current market price: $0.93 (foil $17.54), TCGplayer market prices via Scryfall.
Flying Whenever Teneb deals combat damage to a player, you may pay {2}{B}. If you do, put target creature card from a graveyard onto the battlefield under your control.