Grinding Blade

 is a refined material used in crafting or for the commissions.

Obtaining
can be crafted using the Worktable:

One can also be found in a treasure chest near the entrance to Portia School.

Usage
is used in crafting or requested in commissions.

Commission
is occasionally requested on the Commissions Board in Rank B commission.

Craft
is a required ingredient when crafting the following item:

Gift
can be given as a gift to other characters. It is a universally neutral gift.

Recycle
can be placed in the Recycle Machine to produce the following items: