Annulment? I Unlocked the Xiuxian Account with My Backhand

In his previous life, he was the supreme "overlord" at the pinnacle of martial arts, looking down upon the world, but he was betrayed by his best friend and died out of hatred. In this life, he was reborn as Qin Mo, the useless son-in-law of the Lin family in Qingyang City who had lost all his cultivation and was looked down upon. A mysterious shadow of the Eight Desolate World-Suppressing Cauldron in his body became his only way to reach the top again. This tripod does not provide power, but it gives him extraordinary understanding, insight into all things, and the wisdom to deduce heaven's secrets. In this martial arts world where qi and blood are the root, internal strength is the source, and artistic conception is supreme, Qin Mo, as his son-in-law, takes charge of a dilapidated medicine shop. He seems to be in a desperate situation, but in fact he is hiding in the abyss. He no longer relies on brute force to crush him, but uses the insight and mind of his previous life to reduce the dimension of knowledge: he can see through the shortcomings of the technique at a glance, improve the elixir recipe at will, set up a chess game while talking and laughing, and play with his self-righteous opponents in the palm of his hand. From the family strife in Qingyang City, to the power struggle in Liuyun County, to the turmoil of the Imperial Capital of the Great Yan Dynasty... Qin Mo will step by step liquidate the traitors in his past life, explore the mystery of his life experience, and make up for his past regrets. Let's see how a generation of tyrants, as their son-in-law, use knowledge and wisdom as the sharpest weapons, in this land where the strong are respected, once again write their own martial arts legend, and return to the supreme immortal road!