Editing Exterminatus (section)

===Two-Stage Cyclonic Torpedoes===
In the two-stage torpedo, a [[melta]] charge activates first to allow the weapon to burrow into the planet's crust and down to the core. The second stage thermonuclear charge then goes off, causing the planet to break apart Death Star style.

This is really the only way to deal with Necron Tomb Worlds since, due to their tendency to make everything subterranean, they aren't overly bothered by the other methods which devastate the surface (and anything alive) but leave the planet as a whole mostly intact. Talos of the Night Lords used this in a rather unconventional manner; faced with a [[Genesis Chapter]] strike cruiser hiding behind a moon, he [[Awesome|blew a continent-sized hole through the moon]] with one of these, and watched the loyalist ship get torn apart as a new asteroid field got shotgunned into space.