The "Mechanic Master's Certificate" originates from the Dragon and Dungeon worldview, where the threshold for using Power Seeds is quite low, and it doesn't strictly require that the user's life essence be that of a flesh-and-blood creature.
Jiang Zhihui herself didn't use the Power Seed of the Mechanical Master, probably because she's already a Shikigami Summoner, which conflicts with being a Mechanical Master.
At the same time, she's stuck in an environment of "self-centered magic," unable to sell it to other players for resources—in selling to the killing field system, she'd only get the recycling price, which is too much of a loss.
After some thought, Li Cheng decides to use it himself. He adds a Free Attribute point to Intelligence, then opens his laptop to search for universities in the United States related to Mechanical Engineering.
Gray Rain asks curiously, "What are you doing?"
Li Cheng, without looking up, replies, "Buying a university diploma."
