Oswent the Pale tells you, "You do seem like a mighty warrior, but can I trust you? If you can earn my trust by defeating the plans of the Falatacot witches that once imprisoned Asheron on Bur, I'll be more inclined to trust you with a very sensitive mission..."
(You receive this message if you have not completed the Saving Asheron quest.
New Speech from November, if you have completed the Bur Recall Quest (you may have to complete it again):
Oswent the Pale tells you, "You've investigated the matter of the Lord Kresovus impostor to my satisfaction."
Oswent the Pale tells you, "I have another mission for you that may prove far more dangerous, but your people need you."
Oswent the Pale tells you, "Deliver this Royal Summons to Kresovus. He will have to accompany you if he wishes to keep his cover. When you and the imposter are away from Linvak and alone you must dispose of him."
Oswent the Pale gives you Royal Summons.
Oswent the Pale tells you, "Have you delivered the Royal Summons to the Lord Kresovus imposter?"
Oswent the Pale tells you, "Be sure that you have him alone before you attack. We wouldn't want the Lugians of Linvak Tukal believing we were trying to assassinate their Leader. I believe once the imposter is dead we can prove to the Lugians their Leader has been missing since the attacks on Linvak Tukal began."