"Is it the Deadly Blue Demon poison?!"
At hearing this, Zhou Sui's pupils constricted. As a top-grade Pill Master, he was well-versed in all sorts of spiritual and poisonous medicines, and knew clearly what this poison entailed.
The so-called Deadly Blue Demon was brewed by cultivating an obscure poisonous plant in the miasmic valleys with the fresh blood of the Seven-step snake. Once the plant bore its quiet blue flowers, they were fed to the same lethal snake. This double-pronged poison aggravated the snake's venom, making its scales take on a blue hue. Severing the snake's tail and discarding the first two drops of blood, the subsequent three droplets were used to embed silver needles. These needles gleamed a muted blue, carrying the eerie aura of the Seven-step snake, thus, earning the name Blue Demon.