Side Quests
Towards the end of the game, the guru of time, Gaspar, mentions various events that can take place at different times. Completing the Sidequests, results in various rewards ranging from merely gaining experience, to expanding on the basic story line of the game, to receiving new items and equipment. You can do many of these Sidequests at nearly anytime at the end of the game, but it is easier to do them after the fall of Zeal, when you get the upgraded Epoch. For some of the sidequests, you will NEED the upgraded Epoch.