Sentinel Island is the island that you are teleported to after Maxos' Temple. The player's character should have reached level 15 or higher before entering this area. Upon arriving, the Island will greet you with a quest The Prophecy, where you must select only four of eight people to serve under you if you manage to take control over the Battle Tower. Through a series of quests you will resurrect Laiken's former concubine,Sassan, who will help you break into the tower and defeat him setting up residence in his tower making it your "headquarters".