The Trentren Vilu is the god of Earth, and is a generous spirit and protecter of all earth’s life.
The legend of Trentren Vilu and Caicai Vilu is the “legend of the geography and origin of the Chiloean archipelago, and mountains of southern Chile”, which was caused by a fierce battle between two mythical snakes, Trentren Vilu (trentren=”related with the earth”, vilu=”snake”) and Caicai Vilu (Caicai=”related with the water”, vilu=”snake”).