World Engine

The World Engine was a massive mobile artificial Necron Tomb World, which was discovered and destroyed by the Imperium in year 926.M41.

Assault
World Engine was attacked in Vidar Sector by 15 Space Marine task forces plus elements from the Imperial Navy, and even the mightiest weapons the Imperial forces could bring to bear could not harm it. Drop Pods and torpedoes could not penetrate its shields and it was impossible to lock on to with teleport beams. The World Engine destroyed a third of an entire Imperial Navy battlefleet before the Chapter Master of the Astral Knights decided to ram the hideous vessel with his Battle Barge, the Tempestus. It was only when the enormous Space Marine starship collided with the Necron construct's shields that they finally failed, allowing the Imperial forces to approach their target. A force of over 700 Astral Knights deployed from Drop Pods onto the Necron vessel's surface. For over 100 hours the Astral Knights fought against tens of thousands of Necron warriors and destroyed every flux generator, weapon forge and command node they came upon. Only after the Chapter had been reduced in size to the Chapter Master, Arthor Amhrad, and five Battle-Brothers did they succeed in their quest. Amhrad detonated Melta-charges that destroyed a vast Necron tomb complex that housed many of the World Engine's command arrays which brought down the vessel's impenetrable Void Shields and also silenced the machine's weaponry. This allowed the Imperial Navy's starships to destroy the World Engine with Cyclonic Torpedoes.

Further fate of World Engine
After the battle, as the Adeptus Mechanicus picked over the remains of the destroyed World Engine, the Ultramarines retrieved the twisted wreckage of the Tempestus and placed it amid the ruins of Safehold, the planet that had been the last victim of the World Engine.

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