Core of Illusion

That orb of invisibility is lovely. It's a pity the Imperial commanders are more scared of their internal security than they are of Tep: we could have saved plenty of time and effort if we had gotten this thing sooner! However, let's be grateful to them for having it in the first place. By using it as a cover, we'll be able to scout the most remote isles and prepare acts of sabotage right under Tep's nose!
However, we'll do that by ourselves: for you, there's a matter of greater importance. Charles and I thought about what the Ghost had said and we concluded he was right. If we find the core of illusion, we'll be able to make Tep lose control over the illusory world that is his main source of power! Yet where can we find that core... Our brothers-in-arms found nothing for now, yet our time is running out. Go back to the world of daydreaming and help them. Find the Pudgy Family, they'll explain the situation. And while you search through the illusory Irdrich, we'll try gaining some extra time for you by causing Tep as much trouble as we can on the real Irdrich.

Reinforcements from the real world? Great!