One is the true identity of Yue Bai. He is the adopted son of the witch king and the younger brother of the queen witch. He killed the Queen Witch and Shijie people, took the stone and water pearl of Nuwa, and wanted to resurrect the idol of Nuwa and rule the world.
The other is Yue Bai's weakness. He has the imprint of "undead robbery" in his heart. Only the pendant with the face of "infinite love" can destroy him. Seven revenge, joined the Yue Bai, looking for these two items, and gave them to Liu Jinyuan.