Disclaimer: This is just a fanfiction of an cross over between Overlord (the anime and light novel) and the Warhammer 40k verses. I will take any feed back in the review section.
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Never since the Horus heresy have Londes suffered such humiliating defeats, ever since his war bands landed on this cursed planet it has been humiliation after humiliation. Hundred of his brother now live in ditches, holes in the ground they themselves dig. His beautiful terminator armor was covered in dirt and mud, memories of glory and hardships to earn this armor, the tale of his glorious due with its previous owner killing him and taking for himself this untainted by chaos suit, now sullied by the dirt and grime those dam Necrons pull them thought.
Ever since his brother and he escape the first encounter it has been wave upon wave of attacks. It took him all of the tactical knowledge he have honed through the heresy, the hundred of years inside the eyes of terror battling chaos marine warband, and the recent black crusade just to regroup with his brother and lead them away from the clutches of the necron. They spend their day and night battling for two week nonstop, the more corrupted member of the warband could substance themselves with the energy of the warp alone, but the same could not be said for their more pure battle brothers. The supply ended a while back, the stockpile enough to feed an entire town for months lasted for only two week, granted space marines need more nutrition than regular humans and his warband gorging themselves on food by the curses of excess is not helping their food situation at all. It have gotten to the point that makes his brother to have to feed on the recycled nutrients from their power armor, making some to actively pray for the dark prince to turn them.
The thought of escaping using this world's remaining ship, even if it is so much smaller than his previous one has crossed Londes mind. But with the necron fleet still up in orbit and the fact that there is still no response from this world's defenses proves that the necron stealth capability is infinitely better than any mean of detection this world has to offer.
With their own ship being destroyed along with its superior scanner there for cutting off the most reliable way to escape the planet. The other way to go off world is to have his liberian Elion teleport the remaining members back to their base in the eye of terror, but such an option is very not preferable. With the expansion of the great rift all psychic beings receive a great boost to their power, Elion also receives a substantial boost which enabled him to teleport the remaining members, but the downside is that he can only go back to their base in the eye no matter how far away they are from it.
Going back there is no more of a death sentence than remaining here, going back means facing the champion of she who thirst. Londes have pride in his swordsmanship but it is nowhere near the capability of Lucious, and said bastard could have let him win their duel to the death, just to be resurrected using Londes' body and forever torment his soul. And also more importantly with the existence of the great rift, the other chaos warband now have the ability to efficiently escape from the eye of terror, once we go back without a ship the possibility of being stranded for all of eternity is much too great.
The only choice left is to conduct a frontal attack on the necron lord of this world, destroying the lord will cause their entire world structure to collapse, and leaving the world would be so much simpler with no undetectable ship killing them. With no other option left Londes order Elion to psychically communicate with the cult of Slaanesh on this planet to start their dark ritual of summoning the army of the dark prince.
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Momonga carefully observed the space marine from his eye in orbit, like insects according to some of his retainers description, they dug their hole in the surface of his world. Their current lifestyle were caused by nonother than Momonga himself, knowing that they can not escape the overlord conducted a series of small scale battle to gauge the battle strength, the strategy and fighting doctrine of their foe in this enclosed environment to prepare for any future conflicts. Not wanting to waste such a rare opportunity Momonga has purposely given the space marines ample time to strategize, to recover and to raided selected settlement mean while minimal his foe casualty, just to see what tactics these warriors will use against him next. Ever since the start of this operation there is no record of any true death in the force fighting for the overlord, due to the doctrine of Nazaric any unit that is less than 20% combat capacity will be immediately teleported back for repair. With these small scale battles, Momonga aim to not only gauge this era strength but to also awaken his tomb in it entirely by straining his force bit by bit in a controlled environment.
"hmm..."
Movement by the space marine have been detected, sudden unforeseen change in behavior. A random change in tactic, the direction they are heading is the location of the entrance of my tomb, but what can cause them to do such, unless they have in some way to discover it.
Momonga have his doubt about the idea of the space marine suddenly know about the location of his great tomb but it does not matter much, the entrance has long been sealed shut by the formation of rock and by the look of these warrior equipment, there is no possible way of them entering his tomb without suffering annihilation.
'what... '
Unstable energy from the immaterium detected on the surface of the planet, a rift in reality open as hundreds of thousands of scantily dressed arm with claw and fang being erupted from it.
'Their mere existence is revolting, if i were to have my stomach it would spill itself inside out, is this what the effects of the immaterium unstable energy on these human biology.'
"Albedo's I believe that the task of culling the cultis is undertaken by Shaltear's. And with the latest report describing that it is currently operating smoothly, compare that to the current reality, would I be expected of a betrayal so soon."
The possibility of a sudden betrayal of his followers is nonexistent, if they were still uncaring emotionless machines. But now with their ego being realized by the c'tan energy tainting them throughout the millennia, Momonga worries that his subjects would start to cause chaos in his court, and he wouldn't want to punish his friend's children too much.
"On behalf of Shaltear, I must apologize master Momonga, I believe that she might have put in too much of an flowery language in that report. Shaltear is not known to be very bright, but I do not question her loyalty."
'That incompetence wench, you only have a single assignment and still fail at such a simple task.'
Albedo silently curses Shaltear worrying about the supreme being assessment of them as a whole would tumble down for the action of just Shaltear.
Momonga witnessed Albedo's face fill with rage as he quickly change the subject, there are more important task at hand right now.
"Send out my army, the lychguard will join in. I want these revolting creatures exterminated from the surface of my world."
"May I ask for your plans for the other invaders my lord?"
"If my hunch is correct then they have somehow discovered the entrance to our tomb, striking them now will only boost their commitment to the assault, continuing the regular tactic and remain unchanging, i will personally deal with them in due time."
"By your will oh supreme one."
With a gentle now Albedo contact Demiurge and Cocytus informing them about the master plan.