The Lost City of Ouroboros

The Lost City of Ouroboros '''is a buried Serpentine city. At the center of it is an arena with a statue of 'The Great Devourer'.'''

Background
Pythor and Skales unearthed it, and attempted to get the four Serpentine tribes to unite. All the Serpentine wanted a fight, so Pythor challenged the four snake Generals for their staffs. Pythor beat them all, succeeding in uniting the tribes, but then Lloyd Garmadon, who was disguised as a Hypnobrai scout, dropped his maracas, revealing himself. Pythor then captures Lloyd, and the Ninjas come to the rescue. Pythor then pits the ninjas against Samurai X, who isn't really attacking. Samurai X lets them escape, defeats a few more Serpentine, then escapes herself. In All of Nothing Pythor said that they needed to go to Ouroborous to summon The Great Devourer. The lost city of Ouroboros is back in The Rise of the Great Devourer when Pythor unleashes him.

Trivia

 * Ouroboros appears to be the only Serpentine city.
 * It is located in a desert (maybe the same desert with the Anacondrai tomb.)
 * The Great Devourer was hidden beneath the city.
 * It has a statue of The Great Devourer in the middle of the city.