Our story follows a cast of soon-to-be students from every corner of the Realms chosen by Odin himself—long retired from his place in Asgard—to become guardians of the World Tree, Yggdrasil, rooted directly in the middle of the Five Realms' most prestigious and selective university, Midguard Academy. But why them, and why now? Who's coming for the prestige, and who's coming for the privileges? And what's a simple succubus got to do to keep herself out trouble when half her classmates are angels? So long as she can keep her head above water and her feet out of Hell, she may just survive long enough to learn the creed of those who've kept order in an ever changing, ever unraveling age of unprecedented chaos: We are the guardians of Yggdrasil. We are the roots that support the unity of the cosmos. We are the anvil on which legends are tempered. We are the Midguard.