Sunfire Torch is a common Artifact — Equipment card from The Lost Caverns of Ixalan (LCI), collector number 167. Current market price: $0.10 (foil $0.13), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+0 and has "Whenever this creature attacks, you may sacrifice Sunfire Torch. When you do, this creature deals 2 damage to any target." Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)