Legendary Son-in-Law: The Man with Poison Talismans

I fondly recall those legendary dreams of the past, filled with the shadows of swords and the glint of blades, a scene brimming with murderous intent.
A son-in-law who married into the family, possessing a strange poison.
The poison will not dissipate, the blade will not cease.
Others kill monsters by hacking and slashing, he kills monsters by waiting.
The young lady of the Qin family coldly replied, "There is absolutely no possibility between us."
Without turning his head, he said, "Women will only slow down my speed in drawing my sword."
From scarecrows to orcs, from zombie caves to Woma temples.
From being ridiculed by everyone to striking fear into the hearts of all of Marfa.
His motto was to subdue people with poison.