"The formation is finally more or less researched. Although it still can't compare to the spiritual energy inside the cultivation tower, it has reached ninety percent similarity."
After inspecting the formation and confirming there were no errors, Ye Chen finally felt completely at ease.
However, before he could continue testing the formation's viability, a sudden, formidable aura descended from the vault of the sky, its terrifying force unleashed like a torrent of floodwaters.
Chapter 873