Dinford:
If you prepare the ingredients and expense necessary for making a Kingdom's Royal Guard Talisman, I will use the methods I have learned from the wizards of the Kingdom's Royal Guard to make the talisman.
The core ingredients are the Blood Crystal and Giant's Energy, of which the Blood Crystal can be obtained through the supply boxes you receive after helping with the assignments of the Kingdom's Royal Guard.
Upgrades can be performed in the same manner. Of course, performance enhancements sometimes require additional materials, so be sure to check what materials you need.