The Nightbringer was disturbed. Something was wrong. First transmissions from several tomb worlds were suddenly cut off. Not really a noteworthy phenomenon, the hated living often destroyed the relatively sensitive long-range communication nodes, but it rarely took more than three microseconds to reroute signals via a new node. This was different, the tomb worlds reported a fleet of ships carrying species 377 entering the system and then suddenly all was silent. The Deceiver had been closest to the tomb worlds in question, and now he had gone missing too. The worlds themselves had vanished in no particular order, as if whomever was causing the phenomenon was just jumping around at random, but that made no sense. Someone with the knowledge to build weapons capable of vanquishing whole worlds would surely have a strategy. The Nightbringer simply could not identify the pattern yet.
Alarms suddenly went off, distracting the Nightbringer from his thoughts. A fleet of ships from species 377 had entered the system. Within two microseconds, the Necron vessels had activated. Within five their engines had heated up to operational levels, and they moved to intercept. A full five-hundred of the grandest Necron battleships and their escorts were stationed around this particular world, one of the greatest displays of Necron firepower in the current universe. The Nightbringer himself trained his senses outward, letting his minions take care of the intruders. This was exactly what had happened on the other worlds, and he would be damned if they caught him unawares, whomever they were. As the fleet of his vessels moved to intercept, all of them suddenly exploded. With a flash, Nightbringer redirected his scans. What he found was troubling, to say the least, as he realised what was happening, and how those other worlds suddenly vanished. It was the result of several facts:
1. The Necrons built their ships, structures, weapons and sometimes even bodies with compartments that were out of phase with the rest of the material universe, basically making stuff bigger on the inside than on the outside.
2. Two objects of matter cannot exist in the same place at the same time. Should the attempt to do so regardless, the stress on the atoms of those objects becomes too great, and they disintegrate, forcing matter outwards in what is best described as a fission-explosion.
3. The lead vessel of the fleet of species 377 was emitting an energy wave that forced matter into a single phase, meaning that Necron structures under the influence of fact 1 materialised, in most cases coming under the influence of fact 2
4. Fact 1 was applicable to the tomb complex Nightbringer was currently residing in, as it was three times larger than the planet it was built on.
Completely unrelated to these facts is the following fact:
5. The last thought of the Nightbringer was roughly the equivalent to the English: 'Oh, shi-'
On the bridge of the Soopa Deff Destroya, Ghazghkull observed the planet beneath him blow up.
"Um, boss, da metil-bone-boyz blew demselves up." his Big Mek reported. "Again." he added as an afterthought.
"Dey'z is cheating! Dem sneaky gitz is tryin' ter prevent me from addin' dere 'eads to me pointy stick!" Ghazghkull bellowed. "Set course fer da next metil bone boyz fortress! I'll show em wot dey get fer trying ter outsmart me!
Surprise! Just thought this up one morning, wrote it down quickly and here we are! Depending on my mood, probably Eldar or Tau next. Please remember that this is a story purely for the lulz. Fact one is actually semi-canon, it's from the Soul Drinkers novel Hellforged.