Platinum Priest

Durrakas, Dragonborn Cleric of Bahamut, renowned for his virtues and world-saving adventures, now stood as the Champion of Bahamut. When Durrakas and his friends are called to fight an avatar of his God's arch-nemesis, the battle takes an unexpected turn. He is forced to make a desperate choice, and as a consequence he finds himself in an unfamiliar land, with his power weakened and the connection to his God frayed and dim. While exploring the world he found himself in, he learns of a mad tyrant plaguing these lands. His principles refuse to allow the tyrant's reign to continue, and he wows to fight against yet another evil.  Yet, a chance meeting will lead him to learn that the nature of the world is far from anything he ever expected. This story is an Inheritance Cycle (Eragon) / Dungeons and Dragons crossover.