A Haxil Beast (Haxil Daemonica) was an enormous species of demon dwelling underground. These beings offered fame, money and success to human men who impregnate human women with its spawn.
The gestation period lasts only days, and the women, once successfully impregnated, are then controlled by the Haxil through a sort of telepathic umbilical bond. This bond is typically used by the Haxil to draw the women to its lair. The birthing process is very unpleasant and the surrogate mothers usually do not survive since the infants are quite often massive as well. Even if they do, they may wish they hadn't.
It was killed when Angel threw a container of liquid nitrogen at it which Wesley then shot open, causing the demon to freeze. Cordelia then shattered it by smashing with an anchor head.
Powers and abilities
Aside from the abilities to imbue men with his seed in order to impregnate women, as well as control the women, the Haxil demon also possesses enormous physical strength because of its size.
It cannot be killed by decapitation, fire or disembowelment. The only known way to kill it is to freeze it solid with liquid nitrogen.