Era beginning/end
Endrugal, a Shindar, betrays his race's code of secrecy and teaches Thalia, a human, the basics of true magic.
The Shindar, a race of powerful fey mages, were devinely appointed to keep true magic secret. Seing the struggles of humanity, Endrugal betrayed his oath and decided to teach Thala, a simple butcher's daughter, about true magic.