Scope the area.

Thanks to Trin, you can still see in complete darkness. She isn't around, however, and neither are the others. The Dungeon Lord doesn't seem present either. Wherever you are, it isn't Laputa, Castle Phoenix, or even the outdoors. It's a small room, similar to others you've seen in this chapel's basement. Strangely, there is no door out. You don't know what room this is, but it seems to be separated from the rest. There's a desk ahead, a shelf nearby, and a cushioned chair in the corner next to a tall brass post. On the top is a crystal.

You walk up and touch your fingers to the post, and the crystal illuminates the room. You squint your eyes in surprise, but then look back to the black and white wallpaper of a solemn winter night. While the floor is still stone brick, the center has a rug of a deep blue sky. First, you look over the desk. There are some empty journals and old dry ink, but after looking through the drawers, you find something with writing still inside.

The writing is from her--Breiah, daughter of Sigeberht and Carreen, sister of Vivilia and Callisto.

"I believe I finally found a man willing to succumb to our experiments, father," it reads. "He's just as grandfather was. That is to say, he comes from another world entirely. His aspirations are grander than himself, but that means he is willing to do anything to achieve the power he desires. I have come far since your findings. I believe that if we are to work together, we fill finally crack the code behind Goa and the class system. Soon we will be ready to perform the most impressive feat of all, however. Traversal to Earth. There we will find others who fit perfectly into this puzzle. The secret has always been to use those from another world. Elok Daven will be my endgame, but in the meantime, more rats will be required for proper experimentation."

These are rough notes. Maybe she was scribbling stuff down that was gonna make it into a finished journal later. What else is here?

"All I have ever desired is to create the ultimate being, the most powerful Demon King who has ever lived. He will be mine. Then with an unstoppable hound on my leash, a new kingdom will rise under our rule. Tivera will be ours, and then perhaps something more beyond. I wonder if it is truly worth it to traverse worlds yet again. I am rambling now. Father, if you were still here, you would be proud of me. I know it to be true."

The writing is getting messier. I think she realizes her mind was wandering, and she was gonna scrap most of this and start over.

You stand in Breiah's study, though it seems just as abandoned as the rest of the dungeon. There isn't exactly a way out besides a Bunny Hop, so you take some time to really take the room apart. After some time, you finally find a scrap of paper under the chair, wedges between the foot and the wall. You sit down on the cushion, lean back, and see what it says.

"David is his name, but he insists on another name he already had ready. He said something about it being what he was called in his raiding guild? I am not certain yet what he means. This human from another world is not as I expected. He is not as baffled by what he sees. Instead, he seems thrilled to fight monsters and swing a sword around. Perhaps I have underestimate those from Earth. Their world is far beyond my comprehension. This is the true danger of Isekai Theory. It matters little, however, as I will tame him soon. As capable as he might seem, I am far beyond his comprehension as well."

Elok's real name is David?

"They called you a mad king, father, but I know that true salvation comes from progression and evolution. David believes this as well. I have grown tired of watching experiments fail time and time again. This one will work. Watch over me, father. Soon you will see the rise of the most powerful Demon King."

You take the journal and the scrap of paper and tuck them away into your pack. As you do, you hear something come from inside. Rustling around, you withdraw the Sending Stone, and the voice coming out is from Nyllia.

"Hello? Hello?" you speak into the item.

"Kyle!" her voice comes, relieved. "Where are you?"

"I'm not really sure. I think some kind of hidden subterranean room."

"We're here with William, Jelly, and a silver dragon. Are you able to warp home from there?"

"I think the only reason I was pulled back was my rushed last attempt. I was able to push them through, but I was caught in the Dungeon Lord's explosion. Given how we were sucked into the dungeon by a sort of weird portal already, I assume the effect that caught up with me teleported me again. Whatever happened, I was plopped out in this secret study instead. Nothing much here but some weird notes by Breiah."

"Breiah?!" comes a voice in the distance. After some rustling, Vivi begins to speak. "Did you say Breiah?"

"Oh hey, Vivi. That's right. We went to one of the first laboratories Breiah and Elok put together. This is definitely a place where she used to come to write. I'll bring what I found. Where abouts all you all right now?"

"The courtyard, right in the middle. You had pretty good aim."

"All right. You'll see me shortly." You slip the magical walkie-talkie back into your back, wipe the dried blood from your face, squat down, and leap.