Ashimo's expression trembled as he said, "My, my longevity does not rely on your demon blood, but on Master Zuo Qiu's Taoist magic."
Ashi Luo said, "Have you found recently that when you wake up, there are a lot of gray hairs appearing on your head, several a day? Of course, you must have plucked them out in time. That is a sign that the power of the demon blood is about to deplete, and you need to take more."
Ashimo's expression changed dramatically.
For some reason, he had been finding gray hairs every morning for the past few days. It started with one or two strands, then grew to more than a dozen. His heart filled with unease, he hurriedly plucked them out by the roots, then went to ask Zuo Qiu.
And Zuo Qiu said those gray hairs were substituting for his aging, a minimal price to pay for longevity.