I've played through all the available quests on Sunstrider Isle and i am now sitting at level 11 but i never got the quest to learn how to summon my imp. If I did do it the spell never went in my spellbook so I am stuck being unable to summon an imp it seems
That's what I thought at first but my trainers dont have it, after looking it up there is a quest called Windows to the source given by the trainer on Sunstrider that involves collecting essences from the wraiths in Falthrein academy.