This machine soldier is piloted by Heavyarms, who has appeared as reinforcements for the Union Army. Built by Doctor Sisley, it is equipped with numerous heavy weapons. However, only Heavyarms can target all of these weapons at once, and no one else can bring out the full potential of this machine. The Ram Shield equipped on its left arm shatters the castle walls with a band of light.
The Magna Arm protects Castle Britis, the last stronghold of the Union Clan. It opens all its guns to hold off the invasion of OZ World, the Founding Army.