Yaochen was the number one medicine master in his previous life, and the elixir he refined made the immortal world go crazy. After being besieged and killed, he was reborn and decided not to make alchemy anymore. But he soon discovered that he could not improve quickly without refining elixirs. So he came up with a way to make elixirs and only make poison pills. From then on, there was a master of poison in the fairy world, and those who offended him were refined into elixirs.
