Crucible: Trial of Cyric the Mad - The Avatar Series

In the final Avatar Series adventure, an ordinary mortal is chosen as the champion of Cyric the Mad and joins the battle of the gods
 
When Malik, an ordinary mortal, is mysteriously chosen as the champion of Cyric—the Lord of Murder and the Prince of Lies—and imbued with divine powers, he has no idea of the epic struggle that awaits him.
 
Malik is drawn deeper and deeper into the immortal conflict between Cyric and Mystra, the mother of all magic and a former ally. As Cyric’s champion, Malik gets a front row seat in the age-old battle of the gods, meeting such heroes as Adon and Kelemvors—and bearing witness to the final struggle between good and evil.