Fixing Arkaneth's Failures

The final name mentioned on Lord Uthorin's Decree is that of Gyeran Serithyl, an Archmage who was trapped in Caledor during the siege of the White Tower. Unable to aid his brethren in the Tower's defense, he offered his services to Prince Falanas Drakeblade, the one-time rider of the dragon Malyros. Since then, he has aided in the watch over Malyros' Rest. It is likely that he remains there still, guarding the fallen wyrm.

Travel to Malyros' Rest. Find Gyeran Serithyl there, watching over the sacred resting place of the Dragon. Defeat Serithyl and claim his staff as proof of the deed. When you are finished, return to Theradred Kranthar in the Uthorin camp at Drakeshadow with proof of your enemies' deaths.