Natural Gu Refining Method

Bitter shells lived in deep water.

They swallowed the sand and stones in the water, dissolving them into bitter water. Some people pried open their shells and collected this bitter water to brew wine. The resulting Bitter Shell Wine was both bitter and fragrant, with an exceptionally unique taste.

Fang Yuan had once obtained bitter shells. After prying them open, he used their bitter water to refine wine, then used the bitter wine to refine Wine Worm Gu.

Bitter shells were already rather rare, while Thousand Year Bitter Shells were even scarcer. They were excellent materials for Refining Immortal Gu.

The bitter shell in Fang Yuan's hand was a Thousand Year Bitter Shell. Its shell was pitch-black, ringed with circles of white patterns like the growth rings of a tree. Black and white intermingled, making it extremely conspicuous.

Fang Yuan stared intently at the flames beneath the tortoise shell. As for the Thousand Year Bitter Shell in his hand, he did not even look at it before tossing it in.

Refining Immortal Gu was a matter of great importance, so naturally every immortal material had to be inspected.

But Fang Yuan had already inspected them countless times beforehand, ensuring that there was absolutely no room for error in the materials.

Thus, while refining Gu now, Fang Yuan did not need to divide his attention to inspect the immortal materials again. Instead, he focused solely on controlling the heat.

After the Thousand Year Bitter Shell was thrown in, the poisonous blood immediately stopped boiling. However, the poisonous smoke and gas churned violently, like a black python tumbling within.

A powerful stench swiftly arose.

Fang Yuan remained motionless amid the stench, carefully smelling it.

As an immortal zombie, he could not smell anything himself. But with the aid of an investigative killer