Skribolt

The rising star of Clan Skryre, it was Skribolt who had masterminded the fall of the Tilean city of Pavona and the great slave-take from the Badlands. Currently, the Great Warlock was leading the upcoming attack upon Nuln. His orders were to take out that city's forges, and to steal their resources, including blackpowder and a working steam engine, for the Great Skreeductor Zingetail.

Source

 * The End Times Vol IV: Thanquol
 * pg. 8