He is the most powerful Demon that is locked inside the Forbidding. As such, he is their leader—most of the others obey him out of fear, with a few notable exceptions, such as the Reaper. He channels his magic through his "Staff of Power" When the Ellcrys began to fail, the Dagda Mor, the leader of the Demons, used his sorcery to escape the Forbidding with two of his subjects (a Changeling and the Reaper). Seeking to gain revenge on those who imprisoned him, he set out to ensure his victory by sending the Reaper to murder the Chosen. He also set his sights upon Allanon, for Allanon was the only one who could match his power. After all of the Demons broke out, starting the War of the Forbidding, his Demon brethren attacked and slowly pushed the Elven army and their allies back to Arborlon. When the Ellcrys' rebirth was close at hand and the Demon mass had stalled, the Dagda Mor mounted a giant bat to do battle against a Roc-mounted Allanon. Both mounts eventually perished, and the two matched their sorcerous powers on the ground; using his Druid Fire, Allanon managed to kill him.
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