Forgotten Realms: The Last Mythal Series by Philip Athans, Richard Baker, Kevin Kraft

Araevin, an elf mage from Evereska, must risk his life and his sanity, as he prepares to battle the House Dlardrageth, an ancient cabal of demon-spawned sun elves who have sworn vengeance against the elven realms that had defeated them in an ancient war. Original.

The fires of hatred, vengeance, lies, and ambition burn in Cormanthor.Sarya Dlardrageth has gone to ground in the ruins of Myth Drannor, seething with hatred for the elves she thought would be easier to defeat.Malkizid has been summoned from the Outer Planes to serve House Dlardrageth, but this servant won’t rest until he’s become the master.Myth Drannor is a symbol of the elves' greatest failure, but can it one day rise again as their greatest victory?

In the hands of an elf high-mage, the fabled mythals are Faerun's most potent sources of magical power. But in the hands of a demon princess from a forgotten epoch, they're the most powerful weapons imaginable.

The story of the elves of Faerûn stretches from the dawn of history to the battle for the future of a world in constant upheaval.