The Coalition's War
Tiamat's black exarch, who waits in the Shadowfell.
The angel Rachaela told the heroes that Mornujhar was hidden in a remote region of the Shadowfell that was only reachable by traveling through Monadhan. There, he guarded a ritualist of incredible power, whose talents were bent to furthering the still-mysterious goals of Tiamat. To reach him, the Champions had to find the Sword of Kas – without it, they would have been trapped forever with the turncoats and traitors of Monadhan.
After a difficult battle, Ionen, Io Reborn was able to force Mornujhar to surrender and swear loyalty to him as the true dragon god.