After communicating in detail with this Yin Spirit for a while, Yun Feng finally realized that this so-called Yinming Artifact Manual was indeed something akin to an artifact-crafting legacy within the Yin Spirit world, though it possessed zero scarcity.
Naturally, humans had no way of knowing about the existence of this item, but among Yin Spirits, the Yinming Artifact Manual was as common as cabbage by the roadside; it was practically common knowledge.
It recorded the crafting methods and required materials for thousands of Yinming artifacts, and when it came to specific crafting techniques and skills, detailed explanations were even attached.
Chapter 417