The Summoning

K'Varn
K'Varn, a beholder detailed in the annals of Vox Machina's history, tried learning from Pseonolax's knowledge of creating and manipulating creatures, he set them loose upon the underdark to reign terror upon its denizens. However, due to the enthusiastic pursuit of wealth, the dwarves delved too deep and reopened themselves to attacks from the underdark. It had also been so long since The Divergence that dwarves had forgot some of their histories and that there were dark terrors that wanted their blood for an ancient slight. K'Varn's creations attracted the attention of the dwarves of Kraghammer along with a fledgling Vox Machina. Vox Machina came down and killed K'Varn and almost killed Pseonolax. This encounter reminded the ancient dragon (turned elder brain) of the dwarves above and his intense hatred for their kind. Yet, the dwarves did not remember him or the threat he posed to their existence. After almost being killed by Vox Machina as an afterthought, Pseonolax vowed vengeance and war would finally come to Kraghammer for all the wrongs visited upon him.

The Summoning
Shortly after the K'Varn incident, the dwarves collapsed and closed all possible connections between the underdark and Kraghammer. They also put into place extensive checks and balances for new mines to prevent an infiltration from the underdark in the future. About 130 years went by as Pseonolax plotted his revenge, but, in the year 940, he made his move. His opening salvo against the dwarves of Kraghammer was to summon an ancient water elemental, a Leviathan, right on top of the Pyrethrone. Almost everyone of status or importance was killed or severely injured that day along with most of Kraghammer's infrastructure. Only by the grace of the Allhammer and countless heroics, did Kraghammer stand and defy the ensuing onslaught.

To this day, water from the elemental Plane of Water pours into the center of Kraghammer and the Leviathan is never able to be permanently banished from its halls. Everything in Kraghammer changed that day and they live with this new reality and make the best of their new situation. In the aftermath of this mass destruction of the dwarven city, Pseonolax sent his oblexes to infiltrate and impersonate key dwarves and wreak havoc on the survivors. This was an apocalyptic time for Kraghammer and began the Dark War.