The Void, also known as the Far Realm, is the region beyond the known multiverse. It is usually described as an infinite chaotic place where the Source exists in its primordial form. Time and space in the Void are fluid, making traveling there impractical. On Earth, names for it include Chaos, Nun, Tehom, Hundun, and Ginnungagap.
Many beings are known to dwell in the Void, although only a very small number of them are conscious. Most of them do not live very long, but those that do are able to grow in size by absorbing other living beings. Some of them have become as powerful as the Elder Gods and the Archdevils. A few, such as the illithids and the aboleth, have been able to enter the multiverse and consume the psychic energy of any life-forms they meet.