The summoning

From 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. From nowhere appears a group of enigmatic sorcerers determined to destroy the phaerimm and save Evereska... for purposes known only to themselves.