Aetherial Annihilation (Overworld Chronicles #11)

Confronted with the prospect of a world without magic, they'll face their toughest challenge yet—how to destroy the crystalline threat and discovering who's behind the attack. But the meteors are all over the planet and getting to them without the use of omniarch portals or magical transportation poses a daunting task.

If Justin and his allies can't disable the meteors in time, the world may lose magic for good and the supernatural community will be destroyed.