The only way to become an Occultist is to have better control of magic crystal powers! First you'll need to collect some materials.
Go to Prism Island Prairie and collect the feather of the Nighthawk Owl, the magic jelly of the Magic Mushroom Jelly Rabbit, and the beautiful essence of the Fabulous Fungus Jelly Rabbit.
After that's done, go to the Schilling Village on the Prism Island Prairie and look for Sage Babama. He is waiting for you there.
Only he can stabilize the great power you wield and help you become an Occultist.
Child, I believe you are ready to become an outstanding Occultist.
The road ahead will be difficult, but I have faith that you will prevail.