The origin myth of Coghan is largely based upon a set of four texts, etched into tablets and strung sequentially with chain or rope, dependent upon which set of slates is in question. Under the protective care of the Prelate Magna and in a location known only to the highest of Prelates, the four tablets describe the origin of Coghan and the world as follows:
The first book describes the plight which has befallen three immortal cosmic siblings: an eldest sister, a middle brother, and a youngest sister: Sky, Earth, and Void, in many simplified depictions. The myth states that so vast and infinite was the nothingness of their home that, when infinite boredom crept into delirium and then catatonia, the tears of isolation formed the first stars and lit the expanse.
The second book describes the sibling’s rage and attempts to break free from their prison of infinity, by attempting to pierce the rose-colored mercurial barrier at the end of time and space itself. In their infinite time, strength, and wisdom, they still failed, and fell catatonic, each of their lips uttering a cosmic wish for the wall to be broken.
The third book describes the piercing of the rose-viscid barrier by four cosmic demons, immortal, vile, and base in their motives. Only four made it through the rose-visid breach before the universe mended itself whole, but it stands to reason that of all the horrors that may exist and be birthed in the beyond, these are the strongest. These demons four ravaged the universe and wrought suffering amongst the cosmos, until the siblings were woken from their stupor in the ensuing chaos.
The fourth book describes the siblings awakening and retreat into the center of the cosmos to flee the might, desires, gluttony, and machinations of their new cosmic counterparts. To this day, the myth claims that these forces fight in the expanse above.
Despite the only very recent recovery of materials and religious artifacts from the Ancient Coga, what is understood of the former empire’s religion aligns alarmingly well with the current mythos. Whether this means the Prelate Magna had access to such texts from early on, or whether the oral tradition of the Coga as they became Coghanese was unusually robust against modification and the wear of time, is unknown.