"The formation is finally more or less researched. While it still can't compare to the spiritual energy inside the cultivation tower, it has already reached a ninety percent similarity."
After inspecting the formation and making sure everything was correct, Ye Chen finally relaxed completely.
Yet before he could go on to test the formation's feasibility, a powerful aura suddenly descended from the vault of the sky, its terrifying force unleashed like a rushing flood.
Chapter 873