They Rend - The Nyxia White Stories, #2

Sometimes to fight monsters.you must become one. When Nyxia White transforms, she realizes she possesses a fearsome weapon and power of the Darkin. There's only one problem, she doesn't know how to use them.yet. Gryn, an old sorcerer, has just the solution-intense training bordering on torture. Now, with little time, Nyx must survive Gryn's training, harness her new power and hunt down whoever kidnapped Acheron, before they rend him to ash-a demon extermination. In order to save her friend, she must become the monster other monsters fear.