Blackmar is a bipedal, yellow, winged demon from Dragon Quest VI that looks a lot like the Demon Stewards from Mortamor's Dreadlair, but its skin is a more orangish tone than them. He is the Archfiend 's most powerful minion and is in charge of keeping an eye on the Supreme Sage Benjamin and all of the ones imprisoned in the Dread Realm.

When the revolt starts, the hero and his party are assigned to defeat this evil beast. Since he fights with two Dragooners, attacks that deal damage to all enemies are recommended.