"This being looks like a hideously ugly human woman. Its flesh is covered with warts, blisters, and open sores. It has straggly jet-black hair and jagged, yellow teeth. The eyes burn like hot coals, throwing out a thick, red radiance."
Night hags are, unlike other hags, actually outsiders hailing from the Gray Wastes of Hades. In addition, hagspawn of night hags tend to resemble normal children of their father's species, with black or blue hair and sometimes blue or violet skin.
Night hags attack good creatures on sight if the odds of success seem favorable. These creatures rip through armor and flesh with their deadly teeth. They love to use sleep and then strangle those who are overcome by it.