Baba Yaga, Fae Invasion, Snow Queen
Al'Mudin, a mysterious prophet from some far-off and unknown land, began suddenly to preach in Nordradania. He preached in opposition to the official gods of the Reymal Empire, teaching instead the doctrines of a new deity: KOL. This repudiation of other gods, particularly the Emperor and his family, lead to his eventual martyrdom and would instigate the Rebellion of Twelve Kings.
The Prophet Al'Mudin was martyred after his preaching against the gods of the Empire reached the ears of a local imperial legate. He was burned at the stake on the Burned Rock, within sight of the fortress of Caer Luen.
Following the martyrdom of Al'Mudin, the twelve ancient northern kingdoms rose in revolt against the Reymal Empire.
On the verge of collapse and unable to bring the northern rebels to heel, the Reymal Empire was forced to concede independence to the North, with the March Lords acting as intermediaries.
Demonic Invasion of Vorsak occurs, driven by a magical accident.
Purge of Vorsak Mages
Purposefully caused by a vengeful Vorsak mage.
Creation of the Magewall Lich hysteria
Materialist conception views this as NU exerting its control over the seat. Leads to the schism with Norther rite Kolism.
Rather than have his lands and title revert to the King of Vorsik, the last count of Klamath gave his lands to the Church of Kol.