The crafting system in Rainbow Moon is pretty simple, as all you really do is fuse materials to your weapons and armor to give it bonus stats. You actually gain access to the first blacksmith inside the first dungeon. Every single piece of weapon and armor has slots available for you to put Materials you acquire in them. Each Material gives certain stats that can improve your characters' survivability. There is a downside, though, as once you put a Material in a piece of equipment's slot, then you cannot undo it. Enhanced equipment can be sold for a higher price than its base counterpart, so when you find stronger weapons and armor, make sure you sell your old ones.

NOTE - There are actually Materials with the same name, but offer different stats, since stronger enemies of the same type will drop them. Also, there are some Materials that don't appear to do anything (they say they are good to sell), but they provide hidden skills and conditions when crafted.