Equinox ∞

General
The Equinox ∞ is a mysterious, if not ominous and twisted version of the Equinox that abruptly appeared through something beyond the Quantum Network, after activating the Celestial Anvil in the Expedition mission, "The Forge of Atlas".

Transcending past space and time, the Equinox ∞ has a different shade of grey for its body, using space grey to darken its overall form, and a carmine color for what used to be orange on the Equinox, posing a much more intimidating feeling from the flagship.

The entirety of the hull is different as well, with removed thrusters on the side in exchange for forward swept wings that brush past the Warp Drive. Dual swept wings meet at the edge of the forward swept wings on the hull body, just before the Warp Drive, giving the ship a "devil"-like appearance.

Extending from the front towards the rear of the fuselage are three thick, carmine fins, one on each side, and one inbetween the swept wings up top. This lastly gives it the ship a more menacing, time-enduring feeling.

The Celestial Anvil
When the player decides to activate the Anvil instead of destroy it, the Anvil opens up, charging some kind of orb or core. In the following cutscene, a massive energy rift breaks the fabric of space, shortly followed by the sudden appearance of the Equinox ∞ as it warps in. And just as it appears, it disappears- with the Anvil nowhere to be found.

Story Speculation
No one quite knows what or where the Equinox ∞ came from. Kharl believes it is an alternate reality version of the Equinox, but the question is quickly followed: Why would the Starlink team steal the Anvil from themselves?

Given the events of the Warden's story provided through Electrical Sparks, activating the Anvil had opened up an ancient pathway to an outside force, one that drove the Wardens from history as we know it. A force capable of that has powers of magnitude far beyond the strength of the Atlas system combined, and the appearance and title of the Equinox ∞ is more than enough to display that.