War of the Frozen Fire

Mystasia is in danger. Someone has created a spell called frozen fire. It is destructive enough to destroy entire armies and castles. The creator of the spell has raised an army that includes medusas, nagas and orcs. To make matters worse, an invisible assassin is hunting down the surviving noble lords. To survive the spell, they must learn who created it. The citizens of Mystasia have no choice but to turn to the dark races for help; one that is reluctant to save the country that betrayed them centuries ago.