- For the realm commonly referred to as the Aether, see Agartha.
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Aether is a musical easter egg in the Call of Duty: Black Ops II & Call of Duty: Black Ops 3 Zombies map Origins, and is part of the Origins Soundtrack. It can be activated by holding the use button in front of both "1" floor panels at Generator 1 and a "5" panel at Generator 5. According to Brian Tuey, the idea to hide this song within Origins came on the very last day of the map development.