World without a Master

Go back to the real world and relate the Ghost's words to Klavdia.

Before I leave you forever, allow me to tell you something. I've watched the illusory world since its conception. This is not a mere mirage. It's alive, and it's greater, stronger and more beautiful than its creator. The imaginary Irdrich will survive without a master while the dream architect himself will weaken unspeakably without it. And I can give you a hint on how to end his tyranny.
Any spell has its core, so to speak. The world of dreams does as well. That must be some critical spot for this world. I thought the core was in the Cave of Elements, but I was wrong, as you can see. Free the core of illusion from its architect's control, and you'll free the entire Irdrich - first the illusory and then perhaps even the real one. Relate this to all your allies, including the dame we both know.
That is all. Farewell, my friend. Good luck on your path: I'm afraid this ancient evil won't leave the pages of history as peacefully as I am.

That's some story! I wish I could have talked to him. You're surprising me, though: releasing the ghost of an ancient mage without guarantee or anything. Good thing he proved peaceful. What if he hadn't? He even had a fresh body at hand that was willing to take part in some obscure rituals! What if he'd gotten inside you and we'd had another Tep? Maybe that's what he did, eh? Come, tell me where we first met! Eh?!
Right, on the Coba Plateau. All right, then, may he rest in peace. As to his advice... We can surely look for that core of illusion, but I wouldn't be too hopeful if I were you. I don't have much trust in the information from a suicidal fossil.