If you have completed all dungeons before the cosmic rift, pick a spirit ally to take along. Then talk to it in Mana Village and it will tell you to speak to the Benevedons. Each spirit will tell you this and once you collect every item given by the Benevedons, beat the game and there should be an extra dungeon. Happy Hunting!
GamesRadar is the premiere source for everything that matters in the world of video games. Casual or core, console or handheld - whatever systems you own or whatever genres you love, GamesRadar is there to filter out what's worth your time and to help you get even more from your games. We deliver the best advice, the most in-depth features, expert reviews, and the essential guides for all the top games.