Petrovik is a city in Vralia where Fedor Vral fled after escaping imprisonment. Micah ben Ximon laid siege to the city during the winter. The people of the city surrendered and were converted to the Yeshuite faith by Tadeuz Vral.
During the siege, Imriel de la Courcel was imprisoned in Tarkov because it was thought he was a Tartar spy for Fedor Vral. Ben Ximon could not or would not spare a man from his army to vouch for Imriel.