After a few years of being friends, Wei Ying found the way to be a demonic cultivator. He used powers of his own and created the Stygerian tiger amulet.
It was now the fight at nevernight where every Clan is against her. He used his flute which was Chenqing to fight them of, but failed miserably when He saw his older sister, Yanli. getting stabbed by one of the cultivators.
He got weak and at one time, his mouth bled. Lan Wangji was there and tried stopping him while protecting him at the same time. At one point, He knew He couldn't do all of this. So He destroyed his amulet before backing up at the edge of the cliff, ready to fall at any moment. He fell off the cliff, he thought that the only way to bring peace was for him to die as the Yiling Laozu.
Lan Wangji grabbed his hand before he could completely drop down.
"Lan Zhan... Let me go.."
Lan Wangji shakes his head. but Jiang Cheng came up to them with a sword.
"Wei Wuxian! Go to hell!!"
Jiang Cheng stabbed his sword at the edge of the cliff, indicating both of them would fall, but he quickly let go of Lan Wangji as he fell and closed his eyes.
"Wei Ying!!" Lan Zhan shouted.