Yig, the Father of Serpents, and being one of the Great Old Ones. The Serpent deity sends out his minions/children to punish all who has murdered a snake in the past by either killing them or turning into a snake-like creature such as himself.
Shunned and feared in central Oklahoma, Yig was the snake-god of the central plains tribes, presumably the primal source of the more southerly Quetzalcoatl and Kukulcan. Yig is said to be half-anthropormorphic, appearing like a man unless viewed closely. His character is arbitrary and capricious.