Defeat Summoner Kanthin at Manaforge Duro, on the island to the north of Sunfury Hold, and reclaim the Stone of Glacius from him. When you have obtained the stone, use Archmage Vargoth's Staff to contact the archmage.$B$BIf you lose Archmage Vargoth's Staff, speak to Ravandwyr at Area 52 to receive a replacement.