For 10 points, name this Mesoamerican myth system whose primary god is the feathered serpent Quetzalcoatl.
Two gods in this myth system slay a bisexual earth-monster that is some combination of fish, crocodile, and toad, after one god uses his right foot as bait. A dog-headed god in this mythology is associated with lightning, and 400 siblings in this system turn against their mother after she is impregnated by a ball of feathers, but are summarily destroyed after a fully-armed warrior springs from Coatlicue's womb. This mythology contains the child sacrifice-demanding rain god Tlaloc, and the "hummingbird of the left" war god Huitzilopochtli. For 10 points, name this Mesoamerican myth system whose primary god is the feathered serpent Quetzalcoatl.
Two gods in this myth system slay a bisexual earth-monster that is some combination of fish, crocodile, and toad, after one god uses his right foot as bait.
Aztec mythology [accept equivalents]