This chapter is a complete walkthrough for The Demon of Mount Hiei mission. Here, you can find a walkthrough, as beneficial as possible, for this quest from the main storyline. This mission ends with a fight with a boss called White Tiger.
All topics were described in their dedicated sections:
The first crystal
There is a Shrine next to you. Next to it there are door that lead up. There, you can find treasures that are guarded by two dwellers. Defeat them and go down. You can notice a One-Eyed enemy but don't attack him because the crystal, that is next to him, regenerates the enemy's health points. Destroying a crystal while you are on the surface is difficult as well because its energy also regenerates. Instead of that, you should turn left where you can see two paths. Walk down the first one and you will find a Kodama that is hiding behind a tree. When you walk down another path, you will see a building. Enter inside and go down the ladder.
When you are at the bottom, you must keep moving forward. If you open the door on the sides, you will be able to collect treasures. Defeat Nurikabe on a wall on the left, after the first turn, and unlock a secret path. Watch out for new enemies, mages. They are easy to defeat and the only thing that can cause you problems are their magic attacks. However, you can easily block them or dodge.
You can see three mages and a crystal. Defeat the first enemy with a headshot. Now, you only have to deal with two of them. When you kill the remaining enemies, you will be able to destroy the crystal. Exit the cave and head left to a ladder. You can also stay here for a moment and look for treasures. When you get back on the surface you can notice that the One-Eyed enemy disappeared and in the place where the crystal was, now, you can only see a hole (be careful so you don't fall down into it).
The second crystal
Go around the hole and go up. Then, follow the first path on the right. It is blocked by crates but you can destroy them. You can find a Kodama at the end of it. Collect treasures and move forward. While you are on your way, you can come across a dweller. You now reach a fork. On the right, you can find a Shrine and a treasure. On the left, there are two buildings between which there is a Yokai Realm. Before you start the fight, you should a dweller located on the top so it won't interrupt the battle by using his bombs.
Defeat the One-Eyed enemy and search the buildings that are in this part of the location. You can find a few items and face skeletons as well as a dweller. If you go forward, you will see a Yoki and an Onyduo that are near a crystal. Don't fight with them and, instead of that, you should stick to the right so you won't provoke them. Thanks to that you go around the crystal and reach a place where you can go down to undergrounds. When you do that, you should watch out for a spearman that will attack you. Keep moving forward until you reach a fork. First, you should go left and open the door.
Behind them, you can find a Yoki and a crystal that must be destroyed. In the room below the wardrobe you can also find a Kodama. Walk down another path, defeat a Yoki and pick up items. Move forward by using another path. Watch out for skeletons and another Yoki. Defeat the enemies and pick up treasures. After that you can go outside. You can now use another Shrine. You can find another Kodama. It is located on the other side of the building that stands in front of you. If you follow the path that leads left, you can find a Kodama that stands next to another building. The same path can take you to the place where the second crystal was. There, you can collect a few treasures.
The third crystal
While you are on your way to a Shrine you can turn right behind the building and defeat dwellers that will attack you. On the right, you can see a building and a ladder. Use your ranged weapon and kill the enemy that is above you. Then, use a ladder to get there. When you are on the other side of the building, you must jump down. This allows you to avoid enemies that gathered around the crystal. Move forward and on the first turn that leads left you can collect a Kodama. Then, you can see a way down but before you use it, you can go through grass and reach Hot Springs.
Go down and turn left. Watch out for dwellers, that stand near a body, and for a spearman. At the end of the path you can find door that leads to a cave with a crystal. It is guarded by One-Eyed Imp and two mages. Deal with the Imp first so it won't have time to turn into its adult form. After that you are able to destroy the crystal. Go up and reach Nurikabe. Defeating this enemy allows you to unlock passage that leads to the last Shrine. When you leave the cave, you can go forward and defeat a Yoki and collect treasures. A few steps further you can find a ladder. When you go up, you can choose from two paths: the one on the left leads to the place where the last crystal was and the one on the right leads to the boss arena.
If you go left, you will have to face a warrior and a Yoki. A bit further, on the right, there is an area with an enemy that is similar to Nue. It is also protected by a crystal. The best way to destroy the crystal is to activate a living weapon and deal quick attacks. You can also jump down the hole left by the crystal and collect items. Use the door to leave the cave, they can only be opened from inside. Tips for fight with a Nue type enemy can be found in the dedicated chapter. While you are on your way to the boss, you can stop at a cemetery and collect a Kodama that hides among graves. The boss arena is located at the top of the stairs. Behind the door, you will have to face White Tiger.