What Others Deemed Poison, I Deemed Treasure

Whoosh!

Fang Shu shrank back and withdrew from the cavern, crouching once more in the passageway.

Yet even after retreating, the rusty, fishy taste still lingered in his mouth and nose. His lungs itched as well, giving him the urge to cough.

The abnormalities within his body alarmed Fang Shu even more. He had already passed the Second Tribulation and become an immortal cultivator; he should have long since been immune to all ailments. Forget coughing and itching—even a dry mouth should have been impossible.

"Was this... poisoning?"

He came from the Solitary Gu Hall and possessed both the Insect Method and the Lead Method. He had even refined Purple-Lead Venom Blood and White-Mercury Venom Marrow. Yet he could still be poisoned!?

As Fang Shu considered this, his brows knotted. Though the thought sat badly with him, he had no choice but to consider it.

But before long, his brows relaxed.

Memories churned through his mind, and he quickly recalled a poison capable of afflicting even a body immune to all poisons—Metal-Stone Poison!

This poison was formless and intangible, colorless and odorless. It existed only within metal and stone, and its quantity was usually exceedingly scarce.

It could kill without a trace. Those afflicted would invariably bleed all over, lose their hair, have their skin rot away, their intestines rupture and bellies decay, until they died. The agony was unbearable, their entire bodies melting away. It was one of the most agonizing poisonous deaths in the world.

Even immortal cultivators—even Spirit Immortals—could easily fall prey to Metal-Stone Poison if they were not careful.

Fang Shu had once heard at the Solitary Gu Hall that if metal or stone containing Metal-Stone Poison were forged into a weapon, then even an ordinary weapon, wielded by an ordinary person, might injure a Qi-refining