In pursuit of the ultimate war machine, the kingdom of Hule devised this juggernaut. Only the wizards of Hule know how this construct is given life.
The Hulean juggernaut is a giant stone building built on a platform with huge, iron-banded wheels. Dimensions vary, but it usually stands about 30 feet wide, 40 feet high, and 40 feet long. Battlements and archer slits are both common features, allowing the juggernaut to carry humanoid soldiers and, thereby, increase its deadly power. Many are also affixed with a battering ram.
In combat, the juggernaut simply rolls over its opponents, crushing even small stone buildings beneath it. The battering ram demolishes things too large to simply roll over. The wide wheelbase allows the juggernaut to attack multiple targets at the same time. Anyone caught in front of this leviathan must make a successful saving throw vs. breath weapon to escape to the side or be crushed. Those inside the juggernaut can still attack those who manage to get out of its way. The juggernaut can stop, turn, or reverse in the space of one round, allowing it to attack creatures on any side from one round to the next.
The Hulean juggernaut is immune to magical and normal fire; sleep, charm, and hold spells; and nonmagical weapons. All of its saves succeed on 4 or better. Hulean juggernauts often have treasure inside them (as one of the safest places to store spoils of war), but the creature must be killed in order to gain entry. Only its master can command it to allow entrance.
The juggernauts dependence on its master remains the weak point in its design. While the construct obeys simple verbal commands (like defend this area, attack that fortress, or destroy that army), it is still answerable only to its creator. If the juggernauts master is killed, the creature may continue following its last orders indefinitely. Those inside are trapped, and the juggernaut could even turn on its own army now. Outside of Hule, juggernauts are most commonly found among ruins, waiting for further people and objects to crush.