The nagas are an ancient race of semi divine serpent creatures beings first depicted in ancient Vedic Hindu mythology and oral folklore from at least 5000 B.C.
The word Naga comes from the Sanskrit, and nag is still the word for snake, especially the cobra, in most of the languages of India. Female Nagas are called Nagis or Naginis. In the East Indian pantheon it is connected with the Serpent Spirit and the Dragon Spirit.
Nagas are said to take various forms. Often described as giant serpents with multiple heads or creatures with the upper bodies of humans and lower bodies of vast snakes, they were extremely gifted shape-shifters, able to assume any appearance that suited their needs. (Burmese Nagas were even said to resemble crocodiles.)
Like humans, Nagas show wisdom and concern for others but also cowardice and injustice. Nagas are immortal and potentially dangerous when they have been mistreated. They are susceptible to mankind's disrespectful actions in relation to the environment. The expression of the Nagas' discontent and agitation can be felt as skin diseases, various calamities and so forth.
The nāgas also carry the elixir of life and immortality. One story mentions that when the gods were rationing out the elixir of immortality, the nāgas grabbed a cup. The gods were able to retrieve the cup, but in doing so, spilled a few drops on the ground. The nāgas quickly licked up the drops, but in doing so, cut their tongues on the grass, and since then their tongues have been forked. It was also believed by the Burmese that the precious gem-stones embedded in the throats or fore-heads of the Nagas, that contained their amazing powers, would be given freely to any human that the Naga had developed a great fondness for.
Additionally, Nagas can bestow various types of wealth, assure fertility of crops and the environment as well as decline these blessings. Nagas also serve as protectors and guardians of treasure—both material riches and spiritual wealth.
Dwelling in the watery nether-region of Patalas, they resided there in great splendor and opulence, ruling from massive gem encrusted palaces and mansions. Relegated to that particular region by the creator god Brahma who had grown displeased with their alarming fecundity, they nevertheless led a comfortable existence in that submerged place, free from misery or poverty of any kind.