Go to "Laubhols" in World Map. This appears only after finishing "Ticoon William" scenario. When you get there, walk to the west. Change the choice to "to tower." If it did not appear, try again with some other exits. You have to find the ant from the book chest (do not need to fight), and fight one of the twin Ghouls. These two events happen only once. Then, fight the Devil Grass, Ghoul from the door, and Grass Dancers. If all of these are defeated, Lich appears in the tower. Note: The three battles are reset every time you go out of the tower. If you return, fight them again. In the battle with the Lich, defeat his Guardians first using Delta Petra or Sound Sanctuary. If this succeeds, they become Petrad and die. When you defeat Lich, you can get the Cinder Forge Sword as a scene treasure. The Cinder Forge Sword has a power of 70, which is very strong.