Light of Winter — Jennifer San Filippo

No magical world should be this terrifying. Loss, destruction, betrayal—suddenly, Clara's new magical powers aren't enough to stop the worst from happening. She never expected any of this when she fell through that stupid portal, and now she's not sure she has what it takes to handle it.But Clara and her friends have one chance to stop the utter destruction of Winterlight and save two kingdoms. Though it might require great sacrifice.