Within the Xanth series by Piers Anthony, the Naga absolutely are a race of human-headed serpents which can completely transform among totally human and serpent forms, such as any species and size of snake. s are Shesha (or Ananta), who within the Hindu myth of generation supports Narayana (Vishnu) https://titusoamxi.bcbloggers.com/28469685/the-basic-principles-of-23naga