Xuan Xiao was just about to take out a supreme-grade spirit stone and place it in the groove at the center of the formation when a harsh whistling sound suddenly came from the distant sky.
A black cloud was surging forward at top speed. Within the black cloud was a youth radiating an aura of evil, his cold eyes locked onto Xuan Xiao, who was standing inside the teleportation array.
Xuan Xiao naturally noticed him as well, and his heart sank. The other man's speed was far greater than he had anticipated, and when he swept the man with his Divine Sense, he could not detect the slightest clue about his cultivation level.
Chapter 1591