Half a clear breeze

Chu Xuan transmigrated to a fantasy world and became the young master of a powerful family. He was rebuked for misbehaving just because he sneezed during a banquet. As punishment, he was banished from the ancestral mansion and was relocated to a remote residence.
He did not mind the punishment at all. He just needed a spot that could allow him to be a shut-in. With the system that would allow him to grow stronger by being a shut-in, the longer he stayed indoors, the more powerful he became.
After being a shut-in for a day, he was rewarded with the Indestructible Body Technique.
After being a shut-in for a month, he was rewarded with the Immovable Mountain Technique.
After being a shut-in for a year, he was rewarded with the Yuxu Celestial Scripture and 100 years of cultivation.
After being a shut-in for 10 years, he was rewarded with the Chaotic Indestructible Body and the Bell of Chaos.
…
Chu Xuan declared, “No one can make me leave my home. I like being a shut-in!”

I Stayed At Home For A Century, When I Emerged I Was Invincible

Chu Xuan did not opt to receive the 100 years' worth of cultivation base and the Hundred Divine Tempering Divine Technique rewards immediately. Instead, he taught Ren Changhe the Yin-yang Combination Divine Seal.

After all, receiving the rewards would require a certain amount of time to digest and, since it would require him to cut off the spiritual power infusion to the Myriad Heavenly Mirror, it would also end the connection with Ren Change. He did not want the other party to think that he was a swindler.

"Since you are my in-name disciple, I will teach you a great technique. This technique is called the Yin-yang Combination Divine Seal. If you succeed in cultivating it, you can refine the aura of death into life force, and it will grant you a glimpse into the cycle of life and death and the Great Dao of Yin and Yang."

Ren Changhe bowed respectfully and said, "Thank you, Master!"

Teaching Ren Changhe the Yin-yang Combination Divine Seal