Ancient Sages

The Ancient Sages were a group of wisemen who protected the Mirror of Twilight at the Arbiter's Grounds in The Legend of Zelda: Twilight Princess. 100 years after the Imprisoning War, the sages released Ganondorf from the Sacred Realm and put him on the death sentence at the prison. They chained him to a boulder and impaled him with a blade of light, but the Triforce of Power revived him. Ganondorf broke off his chains and killed one of the sages, and in a hasty act, the surviving sages activated the Twilight Mirror and banished Ganondrof to the Twilight Realm.

The sages instructed Link to go after the shards of the shattered Twilight Mirror to enter the Twilight Realm.