Part 108

Start in the boss room and head up the steps, grabbing a corpse and visiting the shrine.

In the center area, destroy the first crystal. You can snipe mages from cover (press the cover button to crouch behind walls or objects) before engaging the Samurai and Mage.

Head to the spiral staircase, kill the Wheelmonk (optional), and proceed upstairs to find a big chest in the left room.

Enter the wall door, drop down, and kill another Wheelmonk. Continue down the stairs to the lower area.

In a nearby room, destroy the second crystal before engaging the Fiend.

Head towards where the Lightning Fiend was, then go left to a dead end with a big chest.

Go the other way towards the stairs, heading down. Shoot the Paper Yokai and destroy the lantern, being wary of the nearby Mage.

Proceed to the cave area. A corpse is to the right, but the path below is blocked. You can kill a statue to the right (optional).

Hit up the Hot Springs, then continue to the large lantern room, slaughtering all enemies.

Head to the cells and watch for a floor trap. The final crystal is to the right.

Kill the two mages behind the final crystal. Destroy it to trigger the boss fight.