Huitzil is one of an army of identical giant, disproportionately-shaped robots that are classified by his name in plural form. They were created by the alien Pyron 65 millions of years ago, with the goal of exterminating all life on Earth. After killing all dinosaurs, a massive earthquake traps everything deeply beneath Earth's layers. In the present day, after being reactivated by Pyron himself, this unit suffered a bug in its programming, prompting it to guard a young mayan boy named Cecil.