If J.K. Rowling and H.P. Lovecraft had a love child it would be Naomi Novik's Scholomance series. At the end of A Deadly Education El and Orion had survived their attempt to help that year's graduating seniors but wouldn't know if they were successful until their own upcoming Graduation. El is determined to concentrate on preparing for the Graduation Hall gauntlet with her allies, Aadhya and Liu, despite her attraction to Orion and her mother's cryptic warning to "stay away from Orion Lake". Senior year is supposed to be rough but it feels like the school itself is trying to kill her and it apparently wants something from her. If only she can figure out what that is before she dies. It turns out that death is indeed a strong possibility as she starts working on an insane plan to save every student and to destroy The Scholomance itself. She intends to be the very last graduate to exit through the portal or die trying.
The Last Graduate - Lesson Two of the Scholomance