The tragic tale of the Deist Knights and their Wyverns is a significant side story. After obtaining the Airship, you can visit Deist Castle, located on a remote island. Here, you'll find the last surviving Wyvern, gravely injured. To save it, you'll need to find the Pendulum in the Deist Cavern. The Deist Cavern is a challenging dungeon filled with powerful undead and dragon-type enemies. Successfully navigating it and using the Pendulum on the Wyvern will allow you to obtain the Wyvern Egg, a key item for a later quest. This quest provides a rich piece of lore and can lead to powerful rewards.
