Calon asked you to see Gairinerk for more detailed instructions concerning the mission in Beshmundir Temple. You defeated Thurzon the Undying in the Forgotten Storeroom and managed to procure the Magical Essence. When you used the Magical Essence together with the Quartz Rod, the Rift Orb was activated, allowing you entrance to the Prison of Ice where Stormwing is sealed. After concluding the mission successfully, you returned to Gairinerk and received your reward.