The Silver Gryphon by Mercedes Lackey

The third and final book in Mercedes Lackey's classic Mage Wars trilogy featuring the gryphons, set in the beloved fantasy world of Valdemar

A dozen years of peace have passed in the city of White Gryphon, providing well-deserved and much-needed security for the people who lost their homes in the magical Cataclysm that killed the Mage Urtho, creator of the gryphons.

But the inhabitants of White Gryphon have not forgotten their long struggles, and have trained an elite guard force, the Silver Gryphons, to protect their city, and if necessary, to join with the army of the Black Kings for mutual defense.