GameBoyFan.com Walk Through
It turns out that the masked character is really Jenna's brother Felix, the one who was hanging on in the river three years ago. Alex will come in to take the three Elemental Stars from Garet and will send Isaac to get the fourth one. Once the fourth Elemental Star is taken the wise one will appear and scare off everyone except for Isaac and Garet who are far from the exit. The wise one will talk to Isaac and Garet and will keep the magma from
flowing with it's Psynergy. But the wise one won't be able to hold it for long, without the Elemental Stars the chamber will collapse. Run out of Sol Sanctum and return to Vale, where the own folks are witnessing the eruptions and worrying about Isaac and Garet. Everyone will meet up in the Town Healer's Sanctum to figure out what to do next. The Town Healer will share his visions of the Wise One and will send you out on a quest to find the
lighthouses. The next day the town of Vale will wave their goodbyes to Isaac and Garet. You will then be sent out to the overworld, which is a overhead map of the Golden Sun world. Here you can travel from town to town and also encounter enemies for more experience. If you don't know where you're going then press and hold L to zoom out. Also if you don't know what section of the Golden Sun world you're in, Press R. Continue walking South.