The Summoning. The Return of the Archwizards

From the New York Times-bestselling author of Crucible and Beyond the High Road comes the most Realms-shaking event since The Threat from the SeaFrom the depths of the demiplane of shadow comes a new magic so mysterious it confounds even the Chosen of Mystra. From beneath the dune seas of Anauroch escapes one of Toril's most powerful and ancient evils-the phaerimm. From Evereska, the last elven refuge on comes word of invasion.
And from nowhere appears a group of enigmatic sorcerers determined to destroy the phaerimm and save Evereska .