When a human who has done something especially bad in life dies, their soul is weighed down by its sins. In Hell, the soul is brutally torn apart, and the special strength of the sins allow them to maintain the shape of a soul, even as what remains of the human who committed them descends into the lake of boiling blood to be tortured. Eventually, these sins are placed into the flesh pits, to arise as a major devil. Menths are a classification of major devil, the magical devil for Lust.