Chapter 651 Refining the Bone Gu

Ye Tian entered the cave again after reading the booklet. He already knew what these ninety-nine piles of bones were for. The first pile of bones was used to cultivate the first generation of Bone Gu. After three years of cultivation, those that met the standards were selected and placed into the second pile of bones. In this way, after continuous cultivation and selection for ninety-nine times, the Bone Gu that finally met the standards would be placed into the Bone Pit for the final transformation.