AFAIK the Mountain-River Awl strips out human/Dixingian essences and binds them to things like... pillars.
The Merit Brush seems to either awaken (e.g. Zu Ma) or enhance (e.g. Sha Ya) Dixingren powers. And clearly it can also build... um. Power storage facilities?
The Guardian Lantern I'm least clear about. I don't know what it does by itself but it's necessary for the Holy Tools to be able to act in concert. (Or for fusing them, if that' what you're after.)
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AFAIK the Mountain-River Awl strips out human/Dixingian essences and binds them to things like... pillars.
The Merit Brush seems to either awaken (e.g. Zu Ma) or enhance (e.g. Sha Ya) Dixingren powers. And clearly it can also build... um. Power storage facilities?
The Guardian Lantern I'm least clear about. I don't know what it does by itself but it's necessary for the Holy Tools to be able to act in concert. (Or for fusing them, if that' what you're after.)