Wan Lei sat alone on the prayer mat, enveloped by silence and solitude. He carefully recalled the words from the jade slip.

"I, Wan Qingyi, destroyed the Xie Yue Sect yesterday and today, I leave this method on Thunder Emperor Mountain. If any descendant of my clan possesses the Innate Thunder Body, they may cultivate using this method. If an outsider also has the Innate Thunder Body, after testing their disposition, you must not hide it. Instead, hand it over for cultivation and nurture them well. The Innate Thunder Body method primarily utilizes the foundational Dao arts of the Yin Yang Sect—the Yin Yang Dao Rhyme—to cultivate the soul, and the Yin Yang Life-Death Disk to temper the physical body. Once the Yin Yang Dao Rhyme cultivation is successful, it can form a Yin Yang Dharma Domain within the spiritual consciousness, protecting the soul and connecting it to the physical body. Over time, the soul can also be transformed into a Thunder Soul. If you were already a Thunder Soul before, the effect will be even greater. The Yin Yang Life-Death Disk is a treasure of the Yin Yang Sect's foundation. According to the Yin Yang Sect's rules, each batch of disciples has a designated time for cultivation. This treasure is extremely precious. I have created a secret method to secretly draw upon more power of life and death rotation to refine the physical body. You must remember this method: first... This matter causes significant damage to the origin of the Yin Yang Life-Death Disk, and recovery is slow. Therefore, you must proceed stealthily and absolutely do not let the Yin Yang Sect know. If the Yin Yang Sect finds out, they will surely kill anyone who steals their origin. If you are discovered, you must take the Yin Yang Life-Death Disk with you when you flee, uprooting it entirely to use for yourself and to prank them..."

The Thunder Emperor's jade slip contained all this information. The specific operational details would require Wan Lei to experiment himself. He had always heard about the Thunder Emperor's character, but it was all hearsay. Only now, seeing the words left by the Thunder Emperor himself, did he understand: the ancients truly did not deceive him. Stealing someone's origin, being discovered, and then uprooting the entire thing – only the Thunder Emperor could come up with such a plan. It was evident that the Thunder Emperor had intended to do this in the past, perhaps due to politeness or because he was never discovered, so it remained unfinished. Should he fulfill his ancestor's unfinished wish? Young Master Lei began to ponder.

However, that was a matter for the distant future. The most pressing task now was to obtain the Yin Yang Dao Rhyme for cultivation and, while he was at it, inquire about the whereabouts of the Yin Yang Life-Death Disk. Without delay, Young Master Lei stood up and walked out of the cave dwelling. Outside, everyone had already left. He arrived at the door of the adjacent cave dwelling.

Knock, knock, knock!
"Who is it?!" Qian Duoduo impatiently opened the door.
"Oh, Elder Brother Lei, a rare visitor. Please come in."
"No need to come in, no need. I need your help with something."
"Look at you, speaking like that. Between us brothers, what's there to hesitate about? Just say it." Qian Duoduo patted his chest.
"The Sect Master promised me before that I could choose any cultivation techniques or divine abilities. I saw your Yin Yang Dao Rhyme earlier and liked it, so I came to cultivate it. Could you take me there?"
"A small matter, let's go." Qian Duoduo waved his hand grandly and called back into the cave dwelling, "Wife, I'm taking Elder Brother Lei to the Scripture Pavilion, I'll be back soon."
"Don't shout!" Ba'er Nu's hushed voice came from inside.
"Yo, your progress is quite something." Young Master Lei flew along, a knowing smile on his face.
"Alas, how can I compare to you, Brother Lei? You've already wooed the Fang sisters, truly a role model for us."
"Wh-what?" Young Master Lei was utterly bewildered.
"She just came to deliver some spirit stones and magic treasures. How did it turn into this with you?"
"Hey, we all understand, we all understand. We all heard what Miss Fang the elder said outside your cave dwelling. Brother Lei, you've got the skills."
"Cut it out, don't spread rumors. I'm pure and innocent."
"Come on, you said the same thing when you talked about Fang Xiaoyu, but didn't you end up winning her over?"
"I think I need to explain things to my wife immediately, otherwise, I'm afraid there might be a marital crisis."

Young Master Lei took out his communication jade slip, his divine sense probing it. He recounted the entire incident and sent it to Fang Xiaoyu. A moment later, he received a reply from Fang Xiaoyu. "I know. She complained to me. I scolded her. That idiot must have tried to seduce you. Wait until I get home next time, I'll deal with her."
"Mmm-hmm, Wife, I'm glad you believe me."
"Fool, how could I not believe you? I'm not talking anymore, I'm going to bully Man Yaoyao... no, I'm going to cultivate the Kui Lian Secret Method."

Young Master Lei put away the jade slip, relieved. It was good that his wife didn't misunderstand. Wait... no. Why was she bullying Man Yaoyao? How was she bullying her? Could it be... Young Master Lei's lips curled into a rather sinister smile again...
"Brother Lei, stop thinking about it. Don't be fixated on your sister-in-law. Your wife is not someone to be trifled with."
"I-I'm not fixated..."
"Hey, we're both men, we understand, we understand. Everyone knows you, Young Master Lei, are famously henpecked."
"...Let's duel."

The duel did not occur. Qian Duoduo led Wan Lei all the way to the Scripture Pavilion. The Scripture Pavilion was a seven-story wooden building. At the entrance lay a recliner, upon which slept a slovenly, plump old man. The Daoist robe on the old man was stained with oil, his hands were also oily, and there were scraps of meat hanging from the corners of his mouth as he slept soundly. From the wine and meat on the small table in front of him, it was clear that after eating his fill, the old man had gone to cultivate the Dao of Dreams.

Qian Duoduo, with a sly grin, tiptoed to the old man's side, grabbed his beard, and yanked it hard.
"Oh, my dear goodness, who is this rascal?" The old man woke up with a start and glared fiercely at Qian Duoduo.
"Stop sleeping, old man. I've brought someone to select divine abilities."
"Go up and get it yourself. Just let me know when you're done." The old man waved his hand impatiently.
"This time it's different. Wan Lei is here."
"Who is Wan Lei? Just the young lad behind you? No one can disturb my sleep, no matter who comes." The old man grunted twice and turned over, lying in a more comfortable position.
"This is an honored inheritance disciple, a descendant of the Thunder Emperor, and someone the Sect Master specifically mentioned." Qian Duoduo kindly reminded him.
"Oh, oh, I remember. It's that one who died five years ago. How did he come back to life?" The old man stood up and scrutinized Wan Lei, as if trying to find some trace of a zombie on him.
"Oh my, he's not dead. He's just here to get the Yin Yang Dao Rhyme. Hurry up and take us there." Qian Duoduo pushed the old man and they went upstairs.

Upon reaching the top floor, the old man looked at Wan Lei.
"You have a powerful aura about you. Forget about cultivating the Yin Yang Dao Rhyme. I'll give you an even more formidable divine ability." With that, the old man pulled a dusty scripture from a shelf in a corner.
Written on it were four large characters: "Yin Yang Dao Rhyme." Below that was a parenthesis, and inside the parenthesis were five small characters: "(Great Strong and Mighty Version)."