C1760 The Wonderful City

Looking at the city in the ball below, Bai Xiaohei and the Ice Emperor were both dumbfounded. They couldn't understand how there could be a city in a space without any oxygen or elemental energy at all. Judging from the fact that there were plants in the city, there should be oxygen in there. What was going on?

Just when Bai Xiaohei and the Ice Emperor were shocked by what they saw