C85 How Can I Cure You

He threw the sword to the ground, wiped a handful of blood on his body, then scooped up my sleeve and smeared it over my invisible arm. Gradually, my skin reappeared on that invisible arm. I looked at him in surprise. Could it be that he had already noticed my abnormality and just pretended that he didn't notice it?

How else would he know his blood would make my arm reappear?

Will you..