(Continued) When you reach the entrance of the dungeon, there will be another owl statue. Activate it so you can warp back to it later. Now reset time. Once time is reset, warp to the entrance of the dungeon. You now have a full 72-hour cycle to work on the dungeon. If that's not enough, it's probably enough to find the item, which lets you skip half the dungeon if you need to try again.