A Marvel character of this name helped warn Thor about Demogorge the God Eater, while for some reason this deity was living under New York in a 1982 horror film starring Michael Moriarty.  
In Castlevania: Aria of Sorrow, a creature of this name serves as a mount for a fleaman.  The Digi-Egg of Light helps Wormmon evolve into a Digimon whose name derives from this deity.  A Marvel character of this name helped warn Thor about Demogorge the God Eater, while for some reason this deity was living under New York in a 1982 horror film starring Michael Moriarty.  Unmanned Aircraft Systems created a flying machine based on a pterosaur named for this deity, notable for its long neck.  For ten points, name this god, whose Marvel representation retells the famous myth that he was identified with Conquistador Hernando Cortez.
In Castlevania: Aria of Sorrow, a creature of this name serves as a mount for a fleaman.  
Quetzalcoatl