Obtain a set of Sunfury Arcanist Robes, one pair of Sunfury Researcher Gloves and a Sunfury Guardsman Medallion and bring them to Caledis Brightdawn at Manaforge Coruu in Netherstorm. Completing quests for the Scryers will cause your Aldor reputation to decrease.
Infiltrating the ranks of Kael's army will not be an easy task. With my knowledge of illusionary magic I could pass you off as one of Kael's followers, but there are certain details in their uniforms I could not replicate.
Bring me a set of their robes, a pair of their gloves and a Sunfury guardsman medallion. This will make the results of my magic much more convincing.