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The Glykon Volatus is a Cabal Carrier formerly belonging to the Red Legion that was originally utilized by Emperor Calus in a ritual to commune with the Darkness. During the ritual, however, the ship was overtaken by a strange growth, which killed everyone stationed aboard, excluding one lone Scorn test subject. The ship disappeared for several months before reappearing in the Reef and sending a distress signal, which was intercepted by the Vanguard.
The ship was stolen and boarded by a lone Guardian, Katabasis and his Ghost, Gilgamesh, assisted by a Psion officer under the command of Emperor Calus in a Red Legion shipyard on Nessus. The ship was used for experiments on the Scorn in hopes that Calus would be able to understand more about the Darkness. Katabasis piloted the ship to the Reef where he rendezvous with Calus in a Loyalist vessel. It is here where Loyalists bring the Crown of Sorrow. The experimenting with the scorn continued, now utilizing the Crown as a means of observing how the Darkness interfered with the Scorn's corrupted consciousness. Many test subjects perished from "continuous neuron death" except for one who "spoke with many dead voices". This scorn would become the Locus of Communion.
Soon after, the Black Fleet would arrive and seemingly wipe out many planets and moons following the events of Season of Arrivals. The Glykon Volatus would be caught in the very edges of this sweep of Darkness and become abandoned. Katabasis and his Ghost, still trapped aboard the vessel, begin to feel the effects of pure Darkness corruption. While finding a way to escape the locked ship, Katabasis and Gilgamesh begin to talk less and less to each other, growing distant, their personal connection from the light slowly fading. Strange fauna/flora began to grow and develop aboard the ship and the corruption strengthened, Gilgamesh eventually craving suicide, or as he called it, "salvation". Katabasis was firm minded, and refused to let his Ghost kill himself. Eventually, Katabasis gives in, and destroys his ghost with a shot from the Dead Man's Tale.
It is here when Katabasis makes his way to the bridge of the ship and sends a distress signal, the Glykon Volatus being a Red-Legion vessel, sends the signal that is intercepted by The Guardian on the shipyard in the EDZ. The Guardian is then cleared for engagement and the rescue of the distressed Katabasis, referred to as "guardian friend". Aboard the vessel, the Guardian defeats the Locus, and finds a decomposing Katabasis in the bridge, strung up with vines of the strange Darkness fauna/flora, being sucked of light by the Darkness. The Guardian returns week after week, uncovering the secrets of the Glykon Volatus and Calus's ritual with assistance from both Osiris and Caiatl.
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