Magister Xenovia:
Go to Alligator Beach and hunt Crokians, Dailaons, Crokian Warriors and Farhites, and bring me the Dark Crystals you collect there.
You need at least 5 in order to conduct a single experiment.
If the experiments are successful, you can acquire Dark Oxides.
Bring me 3 Dark Oxides and I will give you the Cryptogram of the Sword of the Goddess.