Coatlicues

A coatlicue is a serpentine monster whose upper body resembles that of an attractive woman. They have only been found within the strange valley of Eodon.

Description
Appearing at first glance to be a native Human female, a second look reveals the coatlicue to possess a long, brightly-multicolored serpentine tail, covered in scales. These elusive beings are not particularly resilient or strong, but are lightning-fast and extremely aggressive toward intruders. The bite of the coatlicues is known to carry a deadly venom.

Trivia

 * Coatlicue is Nahuatl for "the one with the skirt of serpents," and is, as mentioned, the appellation of an Aztec deity of great significance. The goddess Coatlicue, known also as Teteoinan, was the mother of the Aztec Gods, giving birth to the the twins Quetzalcoatl and Xolotl and the war god Huitzilopochtli after having been impregnated by a ball of feathers. She was eventually beheaded by an army of her other children, and her gushing blood formed into two snakes, which are shown in the stead of her face in traditional depictions.