The Furies are infernal goddesses of vengeance, lesser members of the Asuras which inhabit the Underworld and guard the Great Pit. The Furies dwell in the Inferno beneath the earth and punish whosoever has sworn a false oath or violate the major taboos of the Gods.
The Furies have waists and limbs entwined with serpents, their eyes drip with blood, and have the wings of bats protruding from their shoulder blades. This renders their appearance as rather horrific.
The wizard Samara witnessed an apparition of one of the Furies when Master Pizentious summoned one to enforce an oath of loyalty among his top three disciples while he left the mortal world to engage the genies of the Elemental Planes.