On Maestrea, we have our fair share of custom items. Some of those custom items are crafted. You can find the recipes using /ccraft. Here are the items you will see listed in the crafting GUI:

Smelting ores in the glimmering furnace can yield Crystals! (The crystal will be dispersed on top of the furnace if one procs to drop, top advice would be to have a max level hopper nearby to pickup said crystals)

Separates a book with multiple vanilla enchants into several books.

Right click to launch yourself in that direction once attached.