Mt. Aleph

Mt. Aleph is the mountain situated north of Vale. This mountain houses Sol Sanctum and the Golden Sun forms at its peak. The Mt. Aleph Boulder, which crashed through Vale and supposedly killed Felix, his parents, and Kyle, came from this mountain as well. Mt. Aleph also houses the secret Elemental Star Room, which keeps the four elemental stars necessary to light the four lighthouse beacons.

The name Mt. Aleph is stated by the legends of the people of Vale to refer to the origin of all things. Among Mt. Aleph's allusions to real-world culture is that its name is based on the first letter of the Hebrew alphabet, א, which is also called an Aleph. The Hebrew connection is likely intended to indicate a parallel that can be drawn between Mt. Aleph and the Biblical Mt. Sinai, where the Ten Commandments were handed down by God; in Golden Sun, for comparison, the god-like entity the Wise One gives his commandment to Isaac while they are still in Mt. Aleph, which would set Isaac off on his quest.

Even though Mt. Aleph cannot be gotten into again (even with a cheat device), NPCs gives you details on the occurings. #1. A girl near the river says the Lava from Mt. Aleph heated the river for a while and #2. A man wearing a red vest near the first set of stairs near the entrance of Vale mentions a crack appeared in the northwest side of Mt. Aleph.

Story
In the prologue to Golden Sun, Saturos and Menardi, along with several other unnamed Mars Adepts, proceed into Sol Sanctum to try and steal the Elemental Stars housed within. These stars represent pure, concentrated Alchemy, something which the Mars Adepts need in order to secure a future for their hometown of Prox. Much to their dismay, they find the Sanctum laced with traps, one of which unleashed a furious storm onto Mt Aleph and Vale. This trap also caused the Mt. Aleph Boulder to fall, seemingly killing Felix's whole family aside from his sister, Jenna, and Isaac's fater, Kyle. In fact these people are not killed, and are instead washed downstream where they are rescued by Sarutos and Menardi, the only survivors of Prox's initial raiding party.

Three years later, Isaac, Jenna, Garet and the Scholar Kraden, seeking to learn more about the secrets of Alchemy, climb into Sol Sanctum to investigate the existence of the legendary Elemental Stars. After solving the riddles of the Sanctum, they are ambushed by Saturos' party once again, this time numbering four. The two new additions are the Mercury Adept Alex and a masked man, later revealed to be none other than Jenna's brother, Felix. Threatening Kraden and Jenna, Isaac and Garet are forced to retrieve three of the Elemental Stars and give them to Saturos, but upon their removal of the Mars Star from its pedestal, a cataclysmic change occurs within the sacred chamber. Without the power of the stars to hold it back, the lava of Mt. Aleph began to stir, changing the serene temple into an extremely dangerous place. Saturos sees this danger and flees, taking Jenna and Kraden with him as hostages to be used as tools to acquire the Mars Star in the event that Isaac and Garet survive the imminent eruption. Unable to make it back to the entrance of the Sanctum, this leaves the remaining two children in a seemingly inescapable situation. It is then that Vale's Guardian, the Wise One appears and halts the lava flow. He buys enough time for Isaac and Garet to flee, as well as redirecting the magma away from Vale, although he does not stop the eruption entirely.

This eruption spews Psynergy Stones across Weyard, causing many drastic changes in the land, such as causing people to become adepts, animals monsters and even creating an entire forest.

From here, the events of Golden Sun and The Lost Age take place, and Mt. Aleph is scarcely mentioned again, aside from in passing in Garoh, where it is revealed that Maha knows the same legends as Vale, that is, that Mt. Aleph was the main location in the sealing of Alchemy (and imminent unsealing). In the final moments of the second game, it turns out that these are not mere legends, as Isaac and Felix join forces, seeking to restore Alchemy to Weyard, having learned that without it, the land will wither and die, something that Saturos had been striving for all along. When they light the final beacon, the Mars Lighthouse north of Prox, the four Lighthouses each emit a brilliant beam of pure energy, gathering together atop Mt. Aleph. This pure golden light is the Golden Sun, the blast of light that marks the formation of the stone of sages, the purest and most powerful source of Psynergy imaginable. Alex, who had vanished after the lighting of Jupiter Lighthouse, had in fact predicted this event and was awaiting atop Mt. Aleph to absorb this energy for his own use. Quickly he discovers that the Wise One had not let his desires materialise, as he had imbued the Mars Star with some of the power of the forming star, meaning that Alex was simply powerful, and not omnipotent. In his rage, Alex attacks the Wise One, only to be easily defeated. Immobilised, Alex cannot flee as Mt. Aleph collapses, and is drawn into the earth along with the mountain and Vale. His ultimate is fate currently unknown.

Eventually, the two protagonist's parties, along with their rescued parents, return to Vale and Mt. Aleph, only to find that it and the surrounding area had been completely destroyed. This dismay is short-lived, as the citizens of Vale had been evacuated by the Wise One before the tragedy befell the area, and were all alive and well. Excluding the events of the upcoming game, Golden Sun DS, this is where the Golden Sun series ends.