PDP Guide Part 15: Palace of the Earth Spirits

Part 14 can be found here.

When you're ready to head on out, go to where the shop is in Former Hell and head up. Go up the three sets of steps and then straight. Head across the bridge and then right. This will bring you to a new area.

First is an Oni who will fight you with a level 37 Suika and level 37 Yuugi. The path is really linear here. Next is a Vengeful Spirit with a level 39 Tojiko. After that, a Female Oni with a level 39 Kasen. Then another Vengeful Spirit, also with a level 39 Tojiko. Then, you will at last have reached the Palace of the Earth Spirits.

First of all, in the lobby is a rather menacing bird. He doesn't appear to do anything, so just ignore him...

In the door to the right you can find a Yin Yang Orb containing a Prismatic Candy. To the far left is another door, this one with a Yin Yang Orb containing an Ecstasy Set. Up the stairs next to the scary bird is another door. Inside this one is Satori. Who will fight you.

I was honestly not expecting to find her so early, so she kind of scared me.

Anyway, she uses a level 45 Orin, level 45 Satori, level 45 Utsuho, and a level 45 Koishi. She will not heal you afterwards, which is sad because her Orin killed my Momiji :(

 Anyway, after you're done dealing with Satori, go back to the scary bird, and then go up. When you can, turn right and head up the stairs. There is a door with an empty room. If you go and try and rest in the bed you will be healed, but you will also be frightened by a surprise Koishi. You know, the floating objects and such in the Prismriver House didn't frighten me at all, but I keep jumping in here. First Satori scares me and then Koishi. They keep popping up where I don't expect them to!

To the left of this room is another door, which leads to a big round room. Go around the circle until you can turn left. Do so and enter the door there. In there is a Yin Yang Orb containing a Chirei Bun. Exit and keep going around the circle to pick up a Yin Yang Orb containing Oath Thread. Then return the way you came. Head back to the right, down the steps, and continue along the center path.  The door at the end will bring you to the central area of the big circular room. Go around the circle to the very center where the fountain is and pick up the Yin Yang Orb containing a Magic Ring.
In the grass here, you can capture Orin, Koishi, Satori, and Utsuho. When you are ready, you can exit the area through the top left. There's a door up there. Uh, you may want to heal and save first though, because the next area is rather menacing...

Part 16 can be found here!