Yuan City was located at the boundaries of the Thunder Prefecture and outside of it was a stretch of desolation. There was also a river that was a hundred thousand metres long, separating the Thunder Prefecture and Jing Prefecture.

In the thirteen prefectures, the river between the Thunder Prefecture and the Jing Prefecture was the dividing line between the Eastern Sage Immortal Emperor's territory and the Thousand Transformations Emperor Lord. Hence now that a war was about to start, this stretch of boundary became the battlefield.

Many mortals who were below immortal-foundation, who used to live in Yuan City, had all relocated away for fear of dying from the aftershocks. However, some immortal experts chose to remain behind, wanting to witness this grand immortal war play out. The commander of the city was none other than Commander Ox.

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