An insubstantial infernal that feeds off fears, doubts, and nightmares

A Shadow Fiend is an insubstantial infernal that feeds off the fears, doubts, and nightmares of living creatures. When seen in well-lit areas it appears as a horned and winged humanoid figure whose lower body trails off into nothing. It lacks any facial features, and its body appears to be composed of dense smoke. It is subtle for an infernal, and can remain hidden among populations of humanoids or monsters for years without being detected. It prefers abandoned homes, old ruins, dark sewers, and tunnels as lairs. A shadow fiend grows stronger the more it feeds, as reflected in the variable HD amount above. When in darkness a shadow fiend is effectively invisible as per the spell. Regardless of whether it is in darkness or not, it moves in complete silence; only the stirring of the air is a hint as to a shadow fiend's passage. A shadow fiend that hits a living target with its touch attack deals the listed amount of damage and at the same time regenerates the shadow fiend. A shadow fiend has the power to move objects up to 10 pounds up to 50 feet away from itself via magic. It can move said objects about 5 feet a round, also using this ability to hurl small objects at enemies within