Valley of Seers

The Valley of Seers is a stage in, being visited on three different occasions in the Legend Mode of the game.

The Sorceress of the Valley
After learning that it was Cia who opened the Gate of Souls and use it to obtain the complete Triforce, Lana joins Link, Impa, and Sheik and accompanies them with the rest of the Hyrulean Forces to the Valley of Seers, where they seek to close the gate and thus stop the tide of monsters pouring out from it.

With Cia waiting atop the Ruins Summit and summoning more Dark Forces to attack the Hyrulean soldiers, Sheik suggests that they capture the West and East Keeps to provide a foothold against the Enemy Base. However, Volga soon appears and engages in combat against Impa and her soldiers, delivering powerful attacks against the Hyrulean Forces. After Lana aids Impa in defeating Volga, he flees from the battlefield and allows the Hyrulean Forces to capture the two vital keeps. This leaves a path to the entrance to the ruins, but the allies find that it is being blocked by vines and the only way to get into the ruins is by lowering the bridge in the east side. It is then that an Engineer offers to assist them and begins to head out to it from the Allied Base while the Hyrulean Forces protect him from the advancing Dark Forces trying to stop him.

Once the Engineer safely reaches the East Ruins and lowers the bridge, Cia sends Summoners to the battlefield to thwart the Hyrulean Force's advance. Furthermore, the allies discover that there are vines impeding the path to the summit of the ruins, thus Lana searches the Western Room for an item capable of cutting down the vines. Conquering the temple reveals a treasure chest containing the Boomerang, which Lana, Link, Impa, and Sheik use to enter the Ruins Summit and confront Cia once and for all.

At the summit, the dark sorceress continues to summon monsters from within the Gate of Souls but stops when she realizes that her Triforce of Power is resonating due to Link and Sheik arriving at the scene. Sensing the presence of two pieces of Triforce, she summons Manhandla from within the Gate of Souls. Although the giant monster begins to attack the Allied Base, it is quickly defeated by the Hyrulean Forces. Back at the altar of the ruins, as the Hyrulean allies are readying to close the Gate of Souls, Cia summons a dark circle and engulfs the allies from below, stealing Link and Sheik's pieces of the Triforce. With the Triforce complete, Cia opens three Gate of Souls from across three different timelines and frees the fragments of an evil spirit within her, empowering the dark sorceress even more and leaving only one fragment left to free: the one guarded by the Master Sword.

Due to Cia opening the Gate of Souls through the ages, three portals appeared in Hyrule. The young heroes, left with no other option but to split up and handle all three gates simultaneously, each departed to a different era, all with the task of closing their gate and returning safely.

Shining Beacon
When Link visits the valley for the second time, he finds Cia using all of her strength to power up Volga. After defeating Cia, she passes the Triforce of Power down to Lana.

March of the Demon King
During the final visit with Ganondorf, his objective becomes to find and defeat Lana, who tries to clone herself to escape. Defeating her will reward Ganondorf with the Triforce of Power.