Ascension of Light (Chronicles of the Endless Book 1) by Joseph Melnick

The Endless… They are beings immune to age and imbued with godlike abilities. Their struggle for power has gone mostly unnoticed since the Immortal War, 3000 years ago, when the Dwarves divided the world at the Dwarf Gate and the Mages of the Nine Powers dropped the peak of Cairn on the Shrine of the Endless.