After fighting a brief civil war, Mykola was replaced by her nephew Koudelkar as Governor but still managed a high degree of influence. Secretly, she invited a delegation of Tau to Pavonis in hopes of giving the world more autonomy outside of the Imperial yoke. The act provoked another round of civil violence between Mykola's and her nephew's forces, resulting Koudelkar being kidnapped by Tau forces. Ultramarines Captain Uriel Ventris was dispatched to deal with the Tau and rescue the Governor. In the resulting war between the Ultramarines 4th Company and the Tau-Mykola loyalist forces on Pavonis, Mykola was killed and the Tau forced to withdraw. In the end however Shonai pledged allegiance to the Emperor once more.