The Flames of Doom was an AOE spell that didn't differentiate between friends or foes. Although the area the archdemon lord hit using this spell had the majority of enemy soldiers, a small number of allies were also there. These allies were similarly killed by the spell.
Jack tried sending a mental command to have the archdemon lord be more careful where it aimed its spell, but Jack felt a mental rejection from the archdemon lord.
It didn't like getting a command.
It continued to throw its spells around. It conjured a gigantic blade of fire that sliced through the earth, causing a long line of flaming trails. The ones that were cut by this flaming blade received an incredible amount of damage if not outright killed. Peniel identified the spell as Blade of Doom.
Another of its spells was the Meteor Stream. A weaker version than the Meteor Shower, a mega spell Master cast using a magic scroll when he invaded the Council of Virtus.