The Siege

The Siege by Troy Denning is the second novel in the Return of the Archwizards trilogy.

"For Evereska, the last elven refuge on Faerûn, it's a battle for survival.

For the Chosen of Mystra, it's a potent rival for their goddess's dominion over magic.

For the human realms of Faerûn, it's a permanent shift in the balance of power.

For a lost race of powerful archwizards, it's a flying mountain they call home."

Summary
Evereska defends itself against the overwhelming phaerimm in a losing battle for survival, the Chosen of Mystra fight for their goddess against the enigmatic Shadovar who wield the powers of the Shadow Weave and the long-exiled Netherese archwizards try to consolidate their foothold in the Prime Material plane, reclaiming what they see as rightfully theirs.

In all this turmoil, the elf Galaeron Nihmedu fights his own shadow for possession of his very being.