If he truly wanted to craft a Ghost Device, Fang Mu would choose to craft it himself using his Ghost Type Beast Yama Pragya, rather than asking Jiang Weng or Shui Miao to help him.
Fang Mu communicated with Yama Pragya, intending to create a Ghost Device. After confirming the primary material, the more thoroughly prepared the auxiliary materials, the better.
Yama Pragya could perfectly determine the quantity of auxiliary materials needed.
Fang Mu spoke to Jiang Weng.
"Elder Jiang, please do keep in mind my intention to craft a Ghost Device."
"Elder Jiang, focus on leading this newly formed Spirit Refining Master Team. Just hand over the collected auxiliary materials to me!"
Jiang Weng, upon hearing Fang Mu's decision not to involve him in crafting the Ghost Device, wasn't displeased at all; instead, he felt relieved.
In Jiang Weng's understanding, a Beast Master could only contract one Ghost Device.