Wei He had an idea.
Having cultivated the Righteous Law Art to his current level, he had long since reached its theoretical peak.
Back when he and Nine Shadows created this cultivation art, it had only been meant to use poison to temper righteousness, strengthen the blood and qi, and prolong life.
Yet now, his blood and qi had not increased by much, while the cultivation art itself had grown more poisonous the further he trained it.
Last time, Wei He had obtained some active fragments from the Ghost Person Face under the Thousand-Faced Demon Lord.
The poison within had even been capable of bringing down Yao Wan, who was at the Full Truth level.
And in a very short time, it had poisoned Yao Wan's legs until her nerves necrosed beyond repair.
After obtaining the source fragments of that poison, Wei He had been tempted, and had invested time into researching them over the years.
In the field of poison, his experience and accumulated knowledge had long since surpassed this world by an entire era.
Combining it with the vast foundational scientific knowledge from his previous life, Wei He had buried his head in research for years.
At last, he had produced some results and incorporated them into his Righteous Law Art.
"Unfortunately, this poison will diminish with every use. At most, it can poison all the force in my body three times. That is already the limit."
Using that small amount of material from back then, Wei He had pushed the compounding and amplification to the limit before obtaining such a large quantity of poison.
After all, he possessed far too much Returning True Force. To coat it all in poison even once required a great amount of toxin.
Though the Righteous Law Art was powerful, it could