The Nightwell, similar to the Sunwell, is a massive font of magical power. Located within the Nighthold, it is the source of Nightborn power, though appears to be under the use of the Burning Legion and Gul'dan. It was created using one of the Pillars of Creation, the Eye of Aman'thul to combine the magical arcane font (presumably a small pool of the waters of the Well of Eternity) in Suramar Palace with the scintillating network of leylines beneath the city that intersected in The Arcway.