From the writings of Lead Historian of Ancient Affairs, Toreshide, 52.4E
After the Treaty of Eight was signed, the continent of Torreth was split into two designated halves. The southern half was the remaining portion of the Autlan Empire, and with the decline in its power and size came a sudden and huge influx to the northern reaches, much of which was previously considered uninhabitable until the rediscovery of magic.
But there was no solace to be had there. The signing of the Treaty of Eight gave way for the most violent decade in all of recorded history: the Archon War. The purpose of the Treaty was to settle land claims for the Autlan Empire, but gave no such distinction for the nations of magic and their godlike leaders. (This was one of the reasons it was signed so shortly after it was originally drafted.)
Each of the Archons, with the exception of Kitsuki, believed themselves to be the most powerful, wise, and capable leader. Some wished to unify the magical nations of Torreth, while others wanted to be the sole leader. They birthed the seven distinct Sources of magic, but they specifically bear little historical significance and as such will not be discussed here.
Since there was no agreement to be had, they waged war with one another, largely over land disputes. (It was at this time that Kitsuki declared her distaste for war and claimed the north-eastern islands as her own.) They fought with the fury of hurricanes and tornadoes. The Archons, it is said, were forces of nature in their own right, and the only thing that could stand up to one was another Archon. This time of conflict at an individual level is referred to in Preserver documents as “Phase One”. Phase One did little to settle land disputes, however. Calitha, for example, would lose a battle to Verik, and then continue taking his land from under his nose anyway through cunning and trickery.
For this reason, the Archons started forming alliances with one another, with two general goals. Calitha, Zephirine, and Keht forged their alliance with the objective of unifying Torreth and bringing the magic realm into a golden age with which it could expand both geographically and scientifically. This was contrasted by the alliance of Verik, Cedrine, and Aluvair, who believed that the seven nations should remain separate, and that individuality and adversity was key to advancement. This is referred to as “Phase Two” of the Archon War, and it was relatively less destructive than Phase One as it lead to many civil discussions between the seven Archons. Kitsuki, in all of these discussions, remained neutral. It is possible that she first proposed the formation of the Preservers in one of these meetings.
Phase Two did not last long. It isn’t entirely known what started the birth of Phase Three, the final phase of the Archon War. It is speculated that Calitha had secretly been teaching others how to use her magic, which was an action that was openly scorned by the Archons. Many Preservers speculate that Keht somehow betrayed the trust of the civil meetings, or that Zephirine was selling secrets to the Koh Liir race on the distant continent of Ithalin in order to gain their favor. There is undeniable significance that all of these rumors put the “unification” side of the Archons in a bad light, but there is little that can be concluded from this.
Phase Three began as the Archons started bringing up disciples of their magics. As magic is pulled from one specific source, teaching more people one type of magic makes each individual’s ability to use it more diluted, and thus this weakened the Archon’s direct power, but on a large scale, having armies that could utilize magic was a significant boon. Battles sprouted like wildfire across the landscape. With Calitha’s exceptional tactical prowess and large army, combined with Zephirine’s ability to manipulate the weather on a continental scale, the war suddenly looked very grim for Verik, Cedrine, and Aluvair. Their position was strongest during Phase One, where their magic allowed them to become unstoppable, but the tables had turned, and if they couldn’t find a way to tip the scales, surrender would soon be the only option.
Their response was a single retaliation on such a massive scale that much of northern Torreth was destroyed, sinking below sea level and creating the Xal Deer Sea. This blow killed thousands upon thousands of people, and is called The Great Sundering by many. This event forced the Archons to rethink their own power, as it had never been used on such a cataclysmic level. This effectively ended the Archon War, as each nation and Archon decided that war was not the answer.