• Find the key in the book On Deirge Cathedral. There are three locations for this key: Alva's House, Blue Palace, and Half-Moon Mill.
• Find the key to the locked bell tower doors in the vestry.
• Find the hymn book in the crypt.
• Take the book to the organ in the nave and activate the organ.
• Take the swords from the sconce and give them to the statues by the altar.
• The burning statue has a health damage enchantment, while the smoking statue has a stamina damage enchantment. You can switch between these at any time, but you must have all three swords in your inventory to do so.