Wizards at War

Wizards at War is the eighth book in the Young Wizards series by Diane Duane. In this book, for the first time in a millennia, the wizards would have to go to war The Lone Power, suspecting that a new threat is rising to its dark abilities, creates a surge of Dark Matter, called "the Pullulus", to eclipse the universe. Because of the way that the Pullulus affects the universe's structure, the Senior Wizards lose their wizardry and only wizards before adulthood are still able to fight. Ponch uses his tracking abilities to lead Nita, Kit, Ronan, and the wizardly tourists from Wizard's Holiday... Filif and Sker'ret across the galaxy to try to find and activate an instrumentality that they are told is the only way to stop the Lone Power. Dairine and Roshaun take a trip back to the Motherboard from High Wizardry to consult the mobiles before joining the others. They find out that the 'weapon' is actually the a version of the Lone Power who never fell. After a few skirmishes with unfriendly agents of the Lone Power, the group finds the world the Hesper is on. Unfortunately, the world is one that is 'lost', or devoted to everything the Lone Power represents.
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