Variations: Tsamtáx, Tsamtás (pl.)
According to the Nivaklé of Paraguay, dry seasons are exacerbated by the Tsamtás serpents, which lie in the middle of the sky and radiate heat. A tsamtáx will intercept and eat the Fanxás or thunderbirds flying from the south and bringing rain with them. Only the shamans can prevent this state of things by tearing down the tsamtás nest, making them fall to their death and allowing the rainy season to return.
Tosetáx is even more terrifying. He arrived after the tsamtás had been dealt with, and installed himself in the center of the sky. Tosetáx is an enormous green and red snake, with three mouths – one at the head, one at the tail, and one in the middle of his body. As with the tsamtás, Tosetáx was waiting to ambush the returning thunderbirds.
Tosetáx was defeated by five powerful shamans who turned themselves into snakes. One of the shamans coiled himself around Tosetáx and, by turning and coiling, took him to the north out of the thunderbirds’ flight path. There the shamans cut off the serpent’s three mouths and cut him in half, killing him.
Chase-Sardi, M.; Costa, M. M.; Mashnshnek, C. O.; Siffredi, A.; Tomasini, J. A.; Wilbert, J. and Simoneau, K. eds. (1987) Folk Literature of the Nivaklé Indians. UCLA Latin American Center Publications, University of California, Los Angeles.