Use the save point right before fighting Gabriel. Once the saved game icon turns blue, return to the arena in Fun City and talk to the old man in the audience in the north side of the arena. Accept his offer to recover your memories. You will return to Arlia on Expel. Leave Arlia, and you will have your Psynard. You can now find the hidden Maze Of Tribulations dungeon at the lone dot on the desert island located southwest on the world map.