Furyborn The empirium trilogy series, book 1.

THE INSTANT NEW YORK TIMES BESTSELLER! "Set in an immersive world of elemental magic, legendary godsbeasts, and cutthroat assassins, Claire Legrand's Furyborn is an addictive, fascinating fantasy." - Kendare Blake, #1 New York Times bestselling author of the Three Dark Crowns series Two fiercely independent young women, centuries apart, hold the power to save their world...or doom it. When assassins ambush her best friend, Rielle Darden...