Prince of Undeath
"My boy! About damn time. You made your creator proud." The Star Child said to William while William remained blank as it took him a few minutes to realize what was happening. The last thing he remembered was him and Rana sharing a passionate love and eventually falling into sleep. Because his chamber was made to be private as possible, the former Imperial Fists of his Space Marines made it withstand any potential damages from outside or within William's chamber (Of course, soundproof).
"Wait, what? Star Child… YOU!" When William fully realized and was aware of his situation, William imminently went into a rage, remembering what Rana told him about Star Child's plan to possess William's child.
"Wow wow hold a second there champ. You are not going full Khorne berserker, are you?" Star Child wave his finger like a magic wand and lift William's body in the air, preventing him from making any momentum.
"Rana told me everything, old man. How should I react after learning that you are planning to take over my kid's body like some kind of meat suit? Why don't you take your blue boy's body instead of mine?" William went full spoiler on Star Child in the end as his rage continue to build. The tension eventually halted when William finally realized what this meeting meant as Star Child continue to stare at him with a smile on his face.
"Wait, wait, you can't possibly mean Rana is bearing my child. We just had our first sex."
"And all it takes is one, my boy. Did you forget your sex ed class? I mean you did even use protection at all. Well, besides your collection of bolters, swords, etc."
"I know about birds and bees! The question is why did Rana and I sleep together after learning of your scheme? What did you do?" William's eyes focused on Star Child who is now attempting to act all casual but failing to convince the Chapter Master.
"I kinda asked one of the local deities to, you know give an extra push. The goddess love with red hair did me a solid in exchange for helping her followers. Let's just say you saved a lot of lives by being a savior instead of a conqueror." Star Child answered William's question and put him down on the chair after seeing the man's rage somewhat subside.
"So what you are telling me is that Rana and I are going to have a child?"
"Bingo! You see, my family tree's heritage is quite powerful when conquering, and you are technically my son (In the sense of genetics and blessings)."
"I'm going to be a father…" William's mind began to travel at the speed of light as his reality turned into 'What ifs' and babyproofing everything.
'Oh my God. My kid is going to have tons of uncles and aunts (Space Marines and Sisters of Battle). I pity the kid who decides to bully my child.' William's thoughts went in a different direction as he doesn't know how his men and women will react to Rana's pregnancy.
"Hey, I know it is so sudden and all but don't worry about it. It will be I, the Emperor's soul will take over and take Imperium in the right direction."
"Take over? Wait a minute, what if my kid is a girl? What are you going to do then?"
"Oh, I know what you are thinking but I know for a certain your kid is a boy. Oops, not sorry for spoiling the gender reveal this early." Star Child laughed and place two large mugs of beer in front of William and for himself.
"Why am I here? You didn't have to spill all these to me and still take my kid's body. You must have a reason for calling me here the night before finishing the last Chaos army." William took the mug and decided to play the game for now. There is no way he can stop Star Child from taking over his child but it doesn't mean there isn't a way to prevent that. For now, William will hear what Star Child has to say and act according to the situation given to him.
"Well, that's the thing. I have a quest for you after you are done with tomorrow's campaign. Do you know why no one is allowed to travel outer space? Why no one standing in the mortal realm can't go beyond the sky and to space?" This question halt William for a second as he remember how The Mother, the AI ship from the Dark Age of Technology had the same problem until William helped her by teleporting her directly to Space and a different dimension.
"I don't know. This world's physics is different from ours?" William gave a last-minute answer to which Star Child show his smug face since he is the only one who knows the truth.
"Wrong. The world is protected by a massive invisible shell, preventing anyone or anything from entering the plane of existence. The only way to break through this shell that protects the world is by using a portal. Not even the gods and goddesses of this realm know who made the protective shell but it sure scared the hell out of them. So to make sure no mortals mess with this shell, the deities of this realm enforce a strict no flying beyond sky rule. This includes you and everyone as well."
The long explanation from the Star Child made sense to William since he actually experienced this before. The reason why The Mother failed multiple attempts to leave the atmosphere now made sense as it was the realm's rule that prevented her from reaching space.
'No wonder she failed and didn't learn from her mistakes. This whole time, she was stopped by the native gods without realizing it.' This revelation also brought a new question to William.
"What if there is a ship already in space? Wouldn't the spaceship in orbit crash?"
"Good question and the answer is no. The rule strictly states that the vessel can't reach orbit but if the ship is already in space. Well, that is unexplored territory even for the gods here." Star Child said to William and he began to realize what the Emperor's soul is going with this.
"You are talking about escaping this world. If I can summon the ship from orbit we can escape this world and travel to your world." The revelation made William forget about his anger earlier as his promise of returning to 40k is about to be realized.
"Yes and no. You still have to transport all your troops and I don't think you can put them into your inventory since they are alive. You must do something for these gods so you can gain their favor and access to travel between space and the mortal realm." Star Child's answer not only made William curious but also wonder what could possibly make the gods of this world make a special exception to no flying law.
"What must I do to gain their favor? I assume this quest must be coming from good sides since they are all about doing deeds and public services."
"By chance are you familiar with the name Tiamat?"
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The other side of the mortal realm.
Four massive armies of the Chaos Gods march towards the direction where Legellan is located. Commanding the four armies are the four Champions of Chaos, former mortals who have proven themselves in the eyes of the Chaos Gods and reached the rank of the Daemon Prince.
As followers of the four Chaos Gods, each Daemon Prince possesses powerful gifts and war gears blessed by the gods. Their traits and characteristics are based on the gods they follow such as Khrone, Tzeentch, Slaanesh, and Nurgle.
In normal circumstances, they would be slaughtering each other to gain more favors from their Chaos God. But, due to the failures of Greater Daemons to kill the Emperor's Champion, the new pack was made until the champion is removed from the Greater Game.
To increase their chances of success, Tzeentch the master of faith and destiny decided to summon all four armies on the other side of the world to strengthen the forces. By the time the four armies reach the Legellan, the Chaos corruption would transform the entire planet into a daemon world, providing enough energy to empower Chaos Gods for good.
"My master's plan will bring the end of this William and the Anathema's plan. We can't fail our mission, unlike our masters' Greater Daemons. Hahahaha." The purple armored Daemon Prince of the Tzeentch, armed with hell forged sword spoke as he flap his wings to stretch.
"All I need to know is where my prey is. The blood will flow once again through my axes and my lord will once again enjoy the cries of the fallen warriors." The Khorne's Daemon Prince sat next to a pile of skulls while sharpening his bloody axes with a sharpening stone. Behind him, his soldiers, both daemons and mortals continue their work, collecting skulls and draining blood from the victims to create a blood lake.
"Be patient my brothers. We were chosen for this for a reason. We have proven our masters beyond their expectations and once we complete our task, we will be masters' greatest champions." The champion of Slaanesh licks his fang with his tongue as he moves one of the pieces from the board game.
"Just leave materials for me when you are done collecting. This might be a great opportunity for me to complete my experiment, unlike those fools who are about to fight Anathema's champion. They will fail of course." The sickly Daemon Prince observes the board game and is about to make his move but halted to rethink his next move.
Just when Champion of the Nurgle was about to make his move on the board game, the sky darkened and the ground began to break apart, releasing steam and the smell of sulfur in the air. Soon, the creatures of undead and demonic began to emerge out of the open ground, forming a formidable army.
"What is that? How did I not foresee this one?" The Champion of the Tzeentch spoke with surprise in his voice. For the first time since his transformation to Deamon Prince, he was genuinely surprised and caught off guard.
"I feel great blood thirst and powerful rage. Someone or something powerful is commanding that army. This is going to be an interesting fight." The Khorne's Champion gets up from his seat to have a better view of who he is sensing.
"It can't be the native deities, right? They don't have a sense of unification to work together like us." The moment Champion of the Slaanesh spoke, the answer to who summoned the army of undead and demons reveal itself.
Flying out of the cracked ground with black smoke, the demonic creature with the head of a goat, horns of a ram, red bloated body, and bat-like wings reveals himself in the mid-air. Standing 15 feet tall and holding a massive wand with a skull on top, the demon lord of the Abyss and the Lord of the Undead appear in person to take Chaos invasion into his hands. Once a mortal just like Daemon Prince, the Demon Lord, and the slayer of the gods observe the four Chaos armies and simply smiled as if he was amused by the attempt of invading the mortal realm.
"There can be only one who brings chaos and evil into this world. For, I will be the last one standing and bring the end of all living on this realm." Orcus, The Shadow That was, the Demon Lord of the 13th layer of the Abyss forcibly broke into the mortal realm to show who is the true master of chaos and began the slaughtering of the rams.