Faith of the Fallen

An ally's return sparks a dangerous war.
Imogen's return should be a time for celebration, but it heralds a dangerous new battle. She's gained new friends and startling new powers. Even that might not be enough to stop what is coming.
The Sul'toral have been defeated but something worse has taken their place.
Gavin and Imogen must understand the key to the powers they face, or all will fall.
Gavin must be more than the Champion to stop a Champion.