The Aether Reactor is a set Utilities found in Firebase Z within the Zombies mode of Call of Duty: Black Ops Cold War. Created by Omega Group to harness the energy generating powers of Aetherium, three Aether Reactors with their collectors power the entire Omgea Outpost 25 facility alongside the village commandeered for the high ranking officials. Within gameplay, each Aether Reactor powers a section of map which it is built around with all three activating powering sections within the "Village" itself.
When a Aether Reactor is activated, the three collectors within the vicinity will automatically activate and start collecting particulates of Aetherium drawn from killed Zombies. During this time, the collectors will take damage with enough causing the Reactor to stop and requiring a reactivation for another 500 Essence. When enough Aetherium is harvested, the Aether Reactor will react violently and unleash an explosion that will kill any undead nearby and award 1,000 Essence for a successful defense.
The Aether Reactor itself is also the secondary defense objective during a Dimensional Tear Assault Wave, with a failed defense causing the Reactor to deactivate and require a reactivation.
They are also a central part of the Main Quest of Firebase Z, Maxis Potential.