The Vestige, also known as the Soulless One, and later Meridia's Champion, the Hero of Coldharbour, and the Savior of Tamriel.
Vestiges are created when a mortal creature has its soul replaced with a Daedric vestige. The resulting Daedra forms an imitation of the mortal's original body from chaotic creatia. he prophecies of the Elder Scrolls speak of a specific "Vestige", the hero known as the Vestige. This Vestige, a Soul Shriven who had been re-attuned to Anuic magic, was foretold to end Molag Bal's attempted Planemeld in 2E 582.
The Planemeld was a massive Daedric invasion of Tamriel in the year 2E 582, during the Interregnum. The Daedric Prince Molag Bal used his Dark Anchors, huge Daedric interplanar machines, in an attempt to drag Nirn out of Mundus and into his own realm of Coldharbour. The scale of the Planemeld is comparable to that of the Oblivion Crisis. It was ultimately prevented by the forces of Meridia and the Eight Divines.