dbc: Sanctum, that's it! I remember in the first Golden Sun I was a little bummed because I beat the game without completing all of Crossbone Isle. Unfortunatley, I had saved ON the Venus Lighthouse. Then it hit me- if I fight the boss and die, I'll appear at the nearest Sanctum, outside of the Lighthouse. All I really have to do now, though, is figure out how to kill my entire party without any enemies to do it for me.