Location from The Elder Scrolls by Bethesda Game Studios
The immortal plane beyond Mundus, realm of the Aedra and source of all magic. Aetherius is where Magnus fled during creation, tearing holes in reality that became the sun and stars through which magicka flows.
Aetherius is the plane of existence from which all magic originates, lying beyond the barrier of Oblivion that separates it from Mundus. When Magnus, the architect of Mundus, abandoned creation, he tore a hole through Oblivion back to Aetherius — this hole is the sun. The Magna Ge who followed him created the stars, and through these perforations, raw magical energy — magicka — flows into the mortal world. The Aedra, the divine beings who sacrificed their power to create Mundus, are said to dream in Aetherius. Sovngarde and other afterlives exist as sub-realms within Aetherius. Unlike Oblivion, Aetherius is generally considered benevolent, though it remains largely unreachable and poorly understood.
Descriptions vary wildly, as few mortals have glimpsed Aetherius and returned. It is said to be a realm of pure light and limitless possibility, where the Aedra dwell in forms beyond mortal comprehension. Sovngarde exists within it as the Nordic afterlife. The sun itself is the greatest window into Aetherius, pouring magical energy into the mortal world.
Also known as: Aetherius, the Immortal Plane, realm of the Divines