chapter 537 Strong enemy from outside the territory

I don't know how much time passed. "look! What a huge city! " Some students screamed. I saw a terrifyingly huge city appear in the confused void ahead, stretching across the void, floating up and down, like a giant beast. "We are here, this is the Guardian City. This city is built on a very critical spatial node. Without its suppression, powerful enemies from outside the region can march in at any time." Elder He said. The spaceship stopped in front of the city. Elder He and the people...