S'cha-ckl'ueu Arc

One of the Ancients' Impossible Machines that was capable of warping reality, used by the Ancients to pacify the First Inferus Outbreak and drive the pestilence into the Red Quarantine Zone.

Ancient Times
The S'cha-ckl-ueu Arc was technology that, like the Genesis Engine and Temporal Matrix, was only adapted by the Ancients and not created by them. The Arc, more than either other Machine was not understood, and its full power would indeed never be realized. It was used once to seal the Inferus into the Red Quarantine Zone, and again once during the war with the Elder Race. After the Ancients were wiped out, the Arc was lost.

Recovery
While the Guardian hunted for the Impossible Machines in Universe D, his search led him to a research station built along a potentially bottomless trench on a cold, dark moon. Having ascertained the location of the Arc, the Guardian realizes it is causing damage to the spacetime around the area, which is why whoever left it here clearly meant to dispose of it in the Chasm of Time. However, the Guardian is pulled into the Chasm and cuts his line so Tom, Aaron and Kate can escape back to the station.

After escaping the moon, Kate and Aaron bring the S'cha-ckl'ueu Arc to a camp of Gondj-Rhyde'i, hoping the giants can help them decipher the symbols on the Arc. However, the giants confirm it is an extinct dialect, and Kate and Aaron escape in the midst of an attack by dragons.

After Uncle Jack's men attack the Guardian's Manor, Lossoriawath is freed by Kate and he steals away in the Temporal Matrix, taking the Arc with him. He is able to read the language engraved on the Arc, and experiments with its power.

John Beckett, Foray and Kate later seal Tyat'Naghra and themselves within the Arc after defeating Lossoriawath. The Arc is recovered by the Guardian and kept until his death.

Doomsday Device
After killing the Guardian, the Ravager boards the Temporal Matrix and opens the S'cha-ckl'ueu Arc which unleashes the full power of the Triangle Holocaust and collapses the first few universes into one Disrupted Timeline. Zach Dawson uses the Arc once more to balance the new universe, which causes the Matrix and the Arc to become fused with the firmament of Thogros. Millenia later, Gerald Rowan and the Blaubist arrive at the tomb of the dragonlords, where they touch the Arc as Gelne had once attempted to do and open a tear in their universe so that they can look outside the universe, to where the dragonlords have been living since the Ghost Crisis. Gerald reaches through the tear to Sean Clements, and the power of the Arc and the Matrix restores the universes.

After the Moonlight Game, the Guardian struggles to make use of the Arc's power against the returned Old Beings. Ultimately, the machine is surrendered to the Other One and taken from this world.