C459 A Bitter Struggle

Su Yun flipped over and sprang to his feet, his teeth clenched as he glared at the figure in black. "Who are you?" he demanded icily.

The man's face, shrouded in the black robe, was barely discernible as that of a middle-aged man, his complexion ghostly pale.

"Who I am is none of your concern, boy. Your constitution, however, is quite unique..