Records say Azvatis broke into the material plane in 1576 BK, and immediately had legions of shadows, the remnants of corrupted mages left behind after they died, at his command.
The discovery of dark magic ended the Spells Age. While the world had never necessarily been at peace before, now any mage could cause destruction on a scale unthought of previously. Cities were left in ruins, empires would crumble and kingdoms implode, and all the while, death and devastation fed the creature who had wrought it all in the first place.
Records say Azvatis broke into the material plane in 1576 BK, and immediately had legions of shadows, the remnants of corrupted mages left behind after they died, at his command.
The Founding was a period of time that saw the end of the Age of Strife and the organization of regions into the kingdoms that we know today.
The Middle Ages are the period of time following the founding of the Kingdoms. It is an era of petty conflicts, but also of, for the most part, geopolitical stability.