Clement of Saullum
The "Oliver Cromwell" of Brestelcia.
Clement of Saullum was the leader of a movement of clerics who seized power in Brestelcia 57 years ago. He and his followers subdued the nobles and the army using magic and armies of religious fanatics. Many of the leaders wore Helms of Devotion, like the one the party seized from Smeerdûk.
When a group of nobles surrendered to them, they took Tulk City and beheaded King Olaf IV. The Interregnum lasted five and a half years. Afterwards, coalition forces from Brestelcia, Misskium, and other realms defeated the clerics and installed King Peter V and Queen Eleanor I on the throne.