Within the Xanth collection by Piers Anthony, the Naga can be a race of human-headed serpents that will change between entirely human and serpent forms, which includes any species and dimensions of snake. Nagas surface from the Dungeons & Dragons roleplaying activity, depicted as large serpents with human heads. https://edwinzshjj.azzablog.com/27879138/5-easy-facts-about-23naga-described