From the back cover:
In the stunning finale to the War of the Burning Sky campaign saga, the heroes lead their armieson a final assault against the might of the Ragesian Empire, and cut out the heart of their foe, the tyrannical Leska.
Companies of friends, legions of deadly wariors, furious beasts, and titanic arcane creations defend the desolate Opaline Wastes, for in hte caverns below, Empress Leska crafts dark sorcery that will bind the world to eternal war.
From the throne room of the imperial palace, the the ash stained fields of war, to the aincient and accursed Heart of History, epic dangers loom against the heroes, and tens of tousands will fight and bleed and die at their side to save their many homelands, for both the end of the war and the fate of the world are thied to the beating of the Aqualine Heart.