Quetzalcoatl is the Aztec god of rain.
By the way, using the real names of mythological characters from South American Indians is great, but they need to be somehow related to their prototypes. It's unlikely that a person familiar with mythology would find it normal that the god of rain has turned into an attacking, shaggy snake that breathes fire. It's like seeing a unit called Ilya Muromets in the form of a small horse with a hump on its back and big ears in a castle taken from Russian mythology. (Only three feet tall, with two humps on its back and ears a yard long
