C253 The Star Lord of the Celestial Fire Star(1)

"Merciless Tiangang Step? What is Unfeeling Heaven's Strength Step? I've lived for so long, but this is the first time I've heard of this name. Boss, how do you know?" The Heaven Connecting Devil Dragon said in a clear voice, sounding extremely surprised.

"Of course I don't know. However, Senior Array God had mentioned it in his Essentials of Array Formation