Ning Qi checked it in his hand, suppressed the ecstasy in his heart, and said lightly: "What is the origin of this stone, and how many do you have? Why throw it into the sea, and the black water dragon will appear."

A trace of doubt flashed in the eyes of the man in black. Seeing that Ning Qi's eyes had gradually turned cold, he hurriedly said: "This is the 'Dragon Stone'. It was discovered by Qianmian Zhenren, and she gave it to us. The Dragon Stone is only for the Dragon Clan. It is effective, I heard that it can nourish the body and strengthen the body, but it is useless to us humans, if we use the normal method, Blackwater Aolong will ignore us at all, and he will only go ashore if he throws a dragon stone into the sea."

"Dragon stone? Useless to humans? Can it strengthen the dragon's physique?"