A few days later, his eyes were completely bloodshot. He paced back and forth in the corpse cave, coming up with ideas one after another. He immediately abandoned some ideas, while others he spent time analyzing in detail.

He even asked Nightcrypt about the types of medicinal ingredients used in the Blood Stream Sect, and was surprised to discover that many of them were unknown in the Spirit Stream Sect. Using some of Nightcrypt's advantages, he went to purchase some ingredients, especially those unique to the Blood Flow Sect. He was pleasantly surprised to find that the raw material prices here were much lower.

Apparently, the Blood Flow Sect did this to encourage disciples to engage in medicinal formulation, although it was of little use. For disciples of the Blood Stream Sect, formulating medicines only took away time from all the battles they engaged in and wasted considerable resources. When they could just go out and rob others, why bother?

Seven days passed. After extensive research to understand how to use Blood Stream Sect medicinal plants and Spirit Stream Sect medicinal plants, he finally came up with his unique medicinal formula.

It had only one function: to grow white hair!

His idea was simple. The intrinsic strength of the corpse didn't matter; his task was to make it grow white hair. Although he wasn't sure how strong the corpse would become later, that wasn't important to him.

He spent two days doing mental work to ensure the medicinal formula was perfect. Then, after nightfall, he excitedly opened his eyes and made a pill furnace. Taking out two crystals from the earth, he began working on a batch of 3-tier medicinal incense.

Two months passed. Others working on corpses had started seeing transformations. However, Yan Xiaobao's corpse had shown no progress at all. Of course, he didn't care about that; he was completely engrossed in his medicinal formulation.

In the Blood Stream Sect, people generally didn't spend much time communicating with each other. In the more than two months since he entered the corpse cave, not a single person came in to talk to him, which was just fine by him. He failed multiple times to produce a batch of 3-level medicinal incense, and each time he did, he would carefully analyze everything and start over again.

Occasionally, a rumbling sound would resonate, but given Yan Xiaobao's current skills in the field of medicine, he was satisfied with the 3-level Spiritual Medicine. Despite his failures, no catastrophic side effects caused chaos in the area.

Another three days passed. Yan Xiaobao excitedly slapped the pill furnace, and when it opened, a rumbling sound echoed, revealing a palm-sized piece of black incense. Pulling it out, he held it in his hand and looked at it suspiciously.

The black incense didn't emit any medicinal fragrance and appeared quite ordinary in nature. Yan Xiaobao scratched his head. After all the adjustments to the formula, this was the final result, but he wasn't sure what kind of medicinal incense it actually was.

"It should work. I put in a lot of Corpse Friend flowers, and some decaying grass. I used various medicinal plants beneficial for upgrading corpses." He looked at the incense, then glanced at the corpses in the blood reservoir. If he were in the Spiritual Sect, he wouldn't dare test it, but considering he was only working with corpses, he wasn't too worried about anything that might happen.

"It'll definitely work!" Taking a deep breath, he clasped his hands together and released some spiritual power, creating an invisible flame to ignite the incense. As the smoke rose, he waved his hand and sent the incense to the corpses. It immediately integrated, causing smoke to roll out and fill the entire tank. Seeing all the smoke, Yan Xiaobao dashed out of the corpse cave and left the entire Corpse Refinery.

He didn't dare stay, for fear of accidentally inhaling some incense, which could lead to an even greater disaster.

...