He moved into Manannan's house with Manannan after the events of King's Quest 3, and tried to conquer the "world of King's Quest" including Daventry, the Island of Tamir, and the Island of Llewdor. His entire army consisted of six incredibly strong soldiers.
He had travelled to Tamir in order to force the Ogres of Tamir to join his forces. However Alexander had tracked him there, poisoned his the six soldiers from his army he had stationed there, and then defeated him in battle. During the era of King's Quest ZZT 2, a statue had been erected in same spot where Ravenlos had died, to honor Alexander's victory.
Ravenlos is able to cast Fireball and Cause Serious Wounds.