Drag to the Underworld is a uncommon Instant card from Theros Beyond Death (THB), collector number 89. Current market price: $0.21 (foil $0.34), TCGplayer market prices via Scryfall.
This spell costs {X} less to cast, where X is your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.) Destroy target creature.