The Nyuvwira is an enormous snake restricted to the Chitipa District of Malawi. It is found in association with minerals, especially precious minerals of monetary value. It can also be found in the mines of South Africa. It is known as Inifwira in Sukwa.
A nyuvwira has eight heads and is the largest snake in the world. It generates electricity and lights at night. It lives underground, which is fortunate as it is extremely toxic. When it moves (about every 200 years) it causes death and disaster. Airplanes flying over a nyuvwira crash.
The skin of a nyuvwira, held in one’s pocket, prevents planes from moving and is a powerful charm for wealth. To kill a nyuvwira one must construct a spiral hut and line it with razors, then entice the snake in by ringing bells. It will crawl over the razors and cut itself to death.
Hargreaves, B. J. (1984) Mythical and Real Snakes of Chitipa District. The Society of Malawi Journal, Vol. 37, No. 1, pp. 40-52.