Aura spells are the initial part of the Star School. This article lists all the trainable spells and item cards of all the available auras. Check out all the spells, their sources and level requirements.
With the release of Polaris, KingsIsle introduced the school jewel packs - with Morganthe, May Cast Aura and Immortal Jewels! Don't you want to cast Morganthe as well? Especially effective at lower levels!