Crown of renewal - Elizabeth Moon

Eight kingdoms in danger, an enemy that cannot die...
Count Jeddrin has received a grisly message. His son, Filis, is dead, brutally killed by Alured the Black - the first move in his plan to take the eight kingdoms.
But Filis managed to send his own message, telling of the dark forces that control Alured, warning of something more than human behind the man's eyes...
Meanwhile, Dorrin Verrakai, last of a long line of magelords, must forever leave the home she loves in order to protect powerful magic relics created by her ancestors. For their power is desired both by Alured, and by the dark elves infesting the kingdoms. Searching for answers, her friend and King, Kieri, considers waking the magelords from their ancient slumber...