As a Lucifer in DxD

Third Person POV

Three months have passed since the battle at the Valefor town. After a few days Grayfia went back to normal at least on the surface.

Cain didn't do much of his role as the supreme commander during this time. Falbium was the one making the strategies this time.

Now Cain was about to start what would be known as the devil purge in the future. 4 devil pillars and 5 extra devil houses will be erased from existence.

Cain knew that if he told the others about his plan they would not agree. To be fair no one will support making multiple clans go extinct at once because of personal reasons.

So he had used the Lucifuge's information gathering powers to send messages to Haagenti, Paimon and Zagan to come in the Valak castle for an important discussion.

Making counterfeit seals weren't hard due to the vast techniques the Lucifuge had. But Cain had to do it himself as Grayfia was still not comfortable with coming in the Lucifuge castle.

"While their house head have a meeting, the rest of their clans will be dead, even if they know it will be too late."

Cain was sure that either Ajuka or Zeaira will come to stop him if they knew of it which was certain.

Cain had planted various evidences pointing at the four houses being the culprit behind the initiation of the devil civil war.

Cain had made his plan foolproof but it is unavoidable that some devil pillars will be against him for this as he will doing a massacre without any warning or proper explained reason.

"Well might as well tell the whose the boss around from now on."

...

Cain teleported above the Valak castle. After making sure that everyone he wanted was inside created a barrier outside the castle using darklight.

Cain had already killed the Remaining clan members of the houses of Paimon, Hagenti, Zagan. He killed them painlessly as they weren't involved in the planned killing him. But those who resisted him were killed in cold blood.

...

Valak was enjoying the chaos he has created in the underworld and dreaming about how he will become the next satan and conquer the world when he saw his fellow devil associates enter his castle.

He went to meet them thinking that something urgent must have come up, as not all four of them were in the same side to the underworld.

He walked towards them and asked them 

"What happened for you three to come in my castle like this?"

But Valak's question was answered by Paimon with another question

"Why we came, you asked us to come here."

"WHAT!"

Valak's mind instantly figured out something was wrong but it was too late just as he was about to tell to run the entirety of the castle was cut open from the top like a chips packet.

And Cain with his scythe resting in his shoulders came down falling slowly due to his 6 pairs of wings.

Seeing that the other three aside from Valak were scared seeing him here.

"What are you doing Lucifer!" 

"What am I doing? I am simply killing my opponents what's so wrong in it?"

"Lord Lucifer, we are on the same side what do you mean?"

"I only mean what I say bitch!"

...

The underworld sky was filled with the screams of the devils in the Valak castle as Cain, his eyes gleaming with a revenge, confronted the devils who had once tried to end his life.

Valak, Hana, Paimon, and Zagan stood outside the castle, their demonic energy cloaking their bodies, trying to protect themselves from the attacks of Cain's Darklight.

Fear gripped them as they recognized the Lucifer they had once sought to kill, was now a bloody devil seeking revenge.

Cain, with a sinister smirk, stepped forward. "You thought you could eliminate me? Well, I'm here to remind you that death has a way of catching up, even to immortal devils like you."

The devils, their arrogance replaced with dread, attempted to summon their clan traits. Before they could even react, Cain unleashed a torrent of darklight, ensnaring them in chains made up of Darklight.

Zagan, the organizer of the failed attempt on Cain's life, pleaded, "Wait, Cain! We can make a deal, spare us!"

Cain's laughter echoed through the Valak castle. "A deal? You had your chance when you tried to kill a child. Now, it's payback time."

Cain's eyes flared with demonic energy as he toyed with his victims, enjoying the fear that dripped from their every word. The castle walls bore witness to the gruesome revenge unfolding.

Hana, her demonic features contorted in terror, stammered, "We were following orders! It wasn't personal!"

Cain, unmoved, replied with a cruel smile, "Oh, it was personal from a long time."

The devils, ensnared in Cain's clan trait couldn't escape the impending doom. With a swift motion, Cain summoned blades made out of Darklight, each dripping with liquid form of the darklight. He approached Zagan first, the master of the devil who tried to kill him.

"You took away my childhood. Now, I take away your existence."

Cain's blades sliced through Zagan with a merciless precision, leaving nothing but a trail of demonic flesh dissolving into the nothingness. The remaining devils quivered, realizing the depth of their impending torment.

Paimon, panic-stricken, babbled, "Cain, we were wrong! We'll do anything, please spare us!"

Cain, lost in a twisted satisfaction, ignored the pleas.

"Spare you? Like you spared my head maid? No, Paimon, you deserve a taste of your own medicine."

Cain's vengeance knew no bounds. He subjected the devils to a relentless onslaught of agony, their screams harmonizing with the underworld. The courtyard, once a place of elegance and secrets, now bore witness to a macabre symphony of revenge.

As Paimon, the second last of Cain's tormentors, fell to the ground, Cain stood amidst the fading echoes of his vengeance. The castle absorbed the horrors, and the Cain casted an indifferent gaze upon the scene.

Cain, the embodiment of death and retribution, surveyed the aftermath of his revenge. The devils' twisted forms lay broken and lifeless, a testament to the strength and his growth from a helpless child to a monster.

Cain sitting on top of the corpse mountain he had created looked at Valak who even after seeing that the things had done to the other three had not a bounce of fear on his face.

Cain had skinned them alive using darklight, made their blood infused with it and run through their body until they died in agony. He had even destroyed the souls of them.

But even after that Valak was not fearing him.

Even the Mornigstar had failed to elicit fear from him but Cain, Valak was feeling unease for the first time.

'Is this fear? No even the angel of death failed to do so, this child can never make me feel fear.'

But seeing Cain's eyes and the cold blooded nature even Valak was second guessing himself.

"I know you are thinking that 'Even the OG Lucifer failed to strike fear into you what can I do?' But let me tell you he was a leader who commanded armies and destruction but fear? That's a different realm."

Saying so Cain realised all of his energy distorting his figure making him look something unholy to Valak.

Seeing that for the first time Valak felt primal fear clawing at the edges of his sanity making him scream.

"STAY AWAY FROM ME YOU MONSTER!!"

With that Cain destroyed his body and scattered his soul.

And after that Cain sat on the mountain of corpses, he looked like the real owner of the scythe he uses for a moment.

And at that moment the barrier he placed was broken down by Zeaira who after seeing him was shocked. But was more terrified of the Carnage he had done across the underworld.

...

Just after Cain had closed the barrier around the Valak castle. The other devils of the rebel faction were told by their spies that the entire clans of Zagan, Paimon and Hagenti were destroyed leaving no survivors.

Zekram immediately called Zeaira and told her to go find the cause, he also went with her. Their finding lead them to the Valak castle which they found enclosed by Darklight.

Seeing that both of them understood that the massacre was done by Cain. 

"Zeaira break the barrier, we need to ask why he did this."

Zeaira hesitated but understood that she needs to ask Cain himself or else she might cause a misunderstanding. So she destroyed the barrier and scene shocked the devils.

Some even got nauseous and vomited after the seeing the gruesome state of the bodies picked upon each other and Cain sitting on them. Even those who had fought in the Great war were scared.

Cain seeing them stood up and came walking towards them. His hair now half red, dripping with blood. Killing intent in the air and his entire body drenched with blood.

Just as he came close Zekram asked 

"Why did you do this?"

Hearing that Cain answered "Search the premises, you will find the reason. And if you want more ask Grayfia."

"You cant just make devil pillars go extinct like this!"

But Cain ignored Zekram and said "There are going to five-six more like this be prepared."

Saying that his spread his wings and stared flying towards the six houses of Lucifer. Leaving Zeaira in a bewildered state

'I need to ask Grayfia what happened.'

...

Cain after that went to the six houses if Lucifer and massacred them all. Fleurety and Agaliarept were killed by Zekram and Falbium at Eligos castle.

Nebiros was no where to be found even after he searched the entire devil society personally.

That left Sanatachia and Sargantas. Both tried to make a deal with him and when he refused tried to attack him but he dealt with them swiftly without any problems.

He also destroyed their clan castle leaving nothing as a remainder to the six houses if Lucifer except Lucifuge who was under Grayfia as per Gerhard's will.

He also told Melissa and Vanessa to ask a builder to erect a grand monument for Gerhard at the place where he died and went off to check on the Malebranche's.

"They are not here huh, Looks like Nebiros was one step ahead but now that I have their weakness they don't amount to much."

Cain destroyed the place and buried it. And went back to his castle and checked on his treasury to find it still full.

"Did Rizevim didn't come like I planned well whatever."

And went back to resting and calming down the storm he had created.

While Zeaira talked with Grayfia and understood the reason behind Cain's action thus not letting any misunderstanding be created between the both of them.

...

As Cain predicted Rizevim to come to the treasury, he did.

Cain had took out all the things and left only coins in there. Rizevim found it weird but he picked up the coins in order to steal them but just as he picked them and saw them. His vein started bulging. He screamed at the top of his lungs 

"Cain you bastard!" And went back

The coin was not made up of gold but made up of gold coloured glass with Jesus drinking wine and eating bread with sunglasses printed on it.

Making it hard for devils to use. 

That day the maids at the Lucifer castle thought that they heard someone scream but thought it to be their imagination.

...

All the fronts have been won by the anti satan faction and only Lucifaad remains standing. While only Bidleid Bashalun Beelzebub was left as the sole commander of the satan faction.

Almost a year has passed since the starting of the civil war, the final battle will finally begin. But what sinister plan has Rizevim planned remains to be a mystery.

"Well everyone has a plan till they are punched in the face."

Said Cain calmly like old magician with a phoenix.

AN:- Bonus chapter at 200 PS.