Usurper

The Nilfgaardian emperor known as the "Usurper" came to power through the overthrow of ruler Fergus var Emreis. After assuming control of the throne he granted the nationwide amnesty, excluding political prisoners of the Empire. He continued the conquests of the North, taking control over at least the Kingdom of Maecht.

He was overthrown and executed by Emhyr var Emreis' supporters in the late 50s of 13th century.