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'''Doomsday Arks''' are[[Necron]] [[grav-tank]]s used for heavy assaults. Similar in appearance to the [[Ghost Ark]] transport, it sacrifices troop carrying capacity in favor of a single devastating [[Doomsday Cannon]]. Making the weapons of the [[Imperium]] seem primitive, even fired at low power the doomsday cannon is ferociously destructive while at full power it eclipses conventional [[plasma weaponsweapon]] s in power many times over and only a [[Titan]] could hope to withstand its firepower.¹