The Arch Mogall class (Japanese: アークビグル Arch Bigl) is one of the monster classes that is exclusive to Fire Emblem: The Sacred Stones. The Arch Mogall class is presumably a promoted version of the Mogall class. While Mogalls did appear in Fire Emblem Gaiden, in that game they had no promoted form.
Arch Mogalls are an enemy-only class. Since they hover above the ground, they can move over terrain such as mountains and water. They have high magic, so they can cause much damage to units with low resistance, but their low HP and defense can make them easy to defeat. Also, their low skill and speed mean that many units will easily dodge their attacks, and usually they will only attack once.
Arch Mogalls use dark magic, but they only appear holding monster dark magic weapons. These include Shadowshot and Crimson Eye, which are only found in the inventories of monsters and have infinite uses.
Mogall of great power. Their dark might far exceeds than of their lesser cousin. ??
Mogall whose dread power exceeds that of their lesser cousins. ??
If one opens Fire Emblem: The Sacred Stones in a hex editor, there is a class and character name list located near the unused set of credits from Fire Emblem: The Binding Blade, in this list Arch Mogall are known by the name "DETHBIGL".
Interestingly, along with not appearing as an enemy in any chapter, this class name seems to absent from the class list in the same location in the leaked prototype, possibly indicating the Arch Mogall class was a slightly later addition, at least relative to the revision of the leaked prototype.
Japanese アークビグル Officially romanized as Arch Bigl.