Mages Deceit - Hidden Gems Saga, #3

Some betrayals run deep.Opal and Jade are equals in almost every way, but only one of them will be promoted within the Order. For Jade, this is her second chance at redemption. She is dismissed as untrained and volatile, so she'll have to prove her worth and step out from the shadow of her sisters. Opal, believing Jade will destroy all she has worked for, will push herself far beyond her limits to earn the title and keep her sister at bay.
When Castian Brightflame comes to train Opal, Jade finds the handsome and enigmatic elf to be an excellent mentor; and foreign emotions cause Jade to wonder if there is more to life than proving herself to her sisters. But dark secrets from their past will be revealed, and they must either heal or risk descending into madness. If these sisters don't find a way to work together, they'll lose everything they love.