C783 Nine Underworlds Heavenly Fire Technique

"Who is that old man?" Nangong Rongxue asked.

"That old man claims to be a Elder from the Tianding Mountain. He saw that my physique is special. So he gave me a pill. " I checked it, and there was nothing wrong with this pill, so I swallowed it. "After I finished swallowing that pill, I felt that there was something wrong with my body." Gui Yun'er said, "Could it be..