War of Wrath
The Void (also known as "Avakúma", "Kúma", the Outer Dark, the Eldest Dark, and the Everlasting Dark) is the nothingness outside Arda. From Arda, it is accessible through the Doors of Night. The Valar exiled Melkor to the Void after his defeat in the War of Wrath. Legend foretells that Melkor will return to Arda just before the apocalyptic battle of Dagor Dagorath. Avakúma is not to be confused with the state of non-being that preceded the creation of Eä.