Hello. When I was playing this mod for the first time I was deeply fascinated by it. So i want to make more rarity for this mod. But i 've been trying for a long time but still haven't been able to solve this problem. And could you give me some suggestions in add more rarity materials?
Thank you very much.

Rarity materials are just items with a tooltip on them. You can either make a mod or use KubeJS or Json Things to create new items without making a mod. Or you could just use any arbitrary item, it doesn't really matter.