I Picked up a World-Destroying Demon King as My Apprentice.

Su Sangning, the head of the immortals, was reborn as a little elder with useless spiritual roots. She picked up a young apprentice, Xie Jin, in the woodshed. Beautiful, obedient, and an excellent cook. Just the way he looked at her was like ice in the abyss. Sang Ning rubbed his head: "Be good, Master will protect you from now on." She healed his wounds, supported him, and dealt with those who bullied and humiliated him one by one. She thought she was raising a scarred cub. Little did she know that what she was warming with her own hands was the most ferocious world-destroying demon in the Demon-Suppressing Abyss. During the Immortal Sect Competition, his true form was exposed, and the whole world was condemned. Immortal spells from the gods fell like rain, vowing to crush him to ashes. Everyone was waiting for the good-for-nothing elder to panic and draw a line. But he saw that goose-yellow figure step out and block the murderous intent in the sky. Su Sangning extinguished the spiritual fire at her fingertips and lazily raised her eyes towards the immortal alliance's thousands of great powers: "Is it your turn to judge the children I raised?" The pressure is overwhelming, and the immortal patterns emerge—— Pu Ning Immortal Lord, who fell in Guixu a hundred years ago and was once the leader of the Immortal Lords, has returned in shock! Xie Jin raised his eyes from behind her and looked at the figure that had been hanging high in the sky for nine days, feeling panic for the first time. It turns out that the light he desperately wanted to monopolize... Belonged to the sky. Later, Heaven was furious and issued laws: "Kill this demon and protect the common people. Otherwise, all the world will die together!" The people cried blood and forced her to make a choice. Su Sangning turned around, and squeezed Xie Jin's cold hand under Xie Jin's almost desperate gaze. She raised her head and looked at Heaven, smiling so brightly that she acted recklessly: "If the rules are wrong, then change them." "Since I want this mountain and river to be safe——" "I also want him to be safe every year." After the simple version of Su Sangning was reborn, he picked up a young apprentice. Apprentice Xie Jin is beautiful, frail, and has excellent cooking skills, but the way she looks at her sometimes doesn't look right. Sang Ning: It's not a big problem, just take care of it. She healed his wounds, taught him swordsmanship, and put all those who bullied him on the wall of the sect. The apprentice is getting better and better, but occasionally—— She would see the flash of destruction in his eyes late at night. Sanning: Hmm... Adolescent rebellion. Until the immortal sect competition, the demonic energy surged into the sky, and he stood in front of everyone in blood-clothed clothes. Those eyes that were always meekly lowered were raised, revealing her familiar crazy smile: "Master, it's so tiring to pretend to be good." "How about... We destroy everything and start over?" Sang Ning sighed and pulled out the natal sword that was famous all over the world. In everyone's horrified eyes, the tip of the sword was raised slightly and pointed at the group of "models of the right path": "Sorry, my child is rebellious." "But whoever touches him, I will send him to reincarnation first." Intention: Love life and be positive