Worldbreaker saga

"On the eve of a recurring catastrophic event known to extinguish nations and reshape continents, a troubled orphan evades death and slavery to uncover her own bloody past--while a world goes to war with itself. In the frozen kingdom of Saiduan, invaders from another realm are decimating whole cities, leaving behind nothing but ash and ruin. At the heart of this war lie the pacifistic Dhai people, once enslaved by the Saiduan and now courted by their...