Diamond Mage (Empire of the Lotus, Book 7) by Dorothy Dreyer
Everything has changed. And it could mean the end of the world.
The comet has arrived. The elite mages, once primed to hold their ground, now find themselves in a panic. They’ve been separated, and the upper hand they once called their own has been stolen right from under their noses.
The Pishacha are ready to release Kashmeru from his tomb, to destroy the Lotus empress, and follow their dark god into the new era. To stop them, the elite mages must give up the very thing they’ve been fighting for—and hope it’s enough to win the war.