Torso Demon

"It got caught in a Geysir vent and pulled from the underworld. KILL IT!"

Description
During the Demon Feet quest from Brickabrack he will give you a recipe for Demon Boots, which are legendary level 27 Leg Armor.

At some point The Torso Demon will pop out of a Geysir and run away from Flux. Upon killing it, it will drop Torso Demon Skin to craft Demonic Boots.