This article contains lore taken from Warcraft III: Reign of Chaos, Warcraft III: The Frozen Throne, the manuals, and/or official bonus maps.
infernal contraption
The Black Citadel had infernal contraptions and infernal juggernauts defending it. An Infernal Contraptions is a less powerful version of the infernal machines. Like the infernal machines, they are tank-like machines that deal piercing damage. A deadlier version of the infernal machines is the infernal juggernauts which deals massive chaos damage.