The Knight of Ruin(DxD)

(Alright, I have taken everything that I have seen and commented on and gone back to edit the previous chapters. Some had minor fixes, while others got some rewrites. Thank you for the commentary, your criticism helps me improve.)

Rias was starting to tire out as Souji was relentless. Every time she launched an attack, he would weave, dodge, or cleave through them. Sometimes her attacks were just waves of Destruction which were easy to dodge or tear apart for him.

He would then tell her that the intensity of her Power of Destruction was lacking in control or weight. Romonus and Sirzechs both were monsters when it came to POD(power of destruction)

Sirzechs in his 'true' form was essentially POD in a human form. When he used it his power was so immense even gods feared it. Souji was unsure how strong he was, but Sirzechs was many times stronger than the original Lucifer.

As for Romonus, he had yet to reach this level of Mastery, but he had already found his path. He would form his POD into thin string-like strands which allowed him to dismantle, cleave, and annihilate with hundreds if not thousands of threads of pure destruction.

This was further increased by his Gravity Magic which crushed everything in a general area, inverted gravity, or turned into solid constructs of gravitational energy with interesting effects. 

Romonus also was a skilled Sword fighter as well, but he would often destroy his swords. Only by infusing his Demonic Energy and Blood into the metal could he prevent this.

At the moment, Romonus and Surtr were watching and waiting for Rias' large reserves to run out. They watched as her face turned into a frown as Souji still had his eyes closed.

She looked over to Romonus who raised his hands and pushed them together. Seeing the clue, she smiled as she did as he said. She placed her hands together and began to force her POD into shape.

This made the Knight open his eyes as he watched her launch a small orb of Destruction at him. He smiled as she learned quickly, just like her brothers. Even if one of them gave her the clue.

"Good job." 

He raised his Katana and sliced it down with a single hand. From his blade, a massive blade of Demonic Energy cleaved her attack which exploded with a massive explosion. Rias raised her arms to protect her eyes from the wind, but when she opened her eyes she saw a huge 10-meter crater of destruction. 

Rias was curious now. 

"Was that me or you?" 

Souji pointed at her.

"That was you." 

"AWESOME!" 

She jumped for joy as she learned something. She ran over to Romonus who had already put his upper clothes back on. 

"Did you see that brother, I did what you told me?" 

He smiled as he ruffled her hair a little. 

"Sure did. Sirzechs taught me that one. Rias, you need to find your way to use Power of Destruction. Each one of us should have a way we use it while I have my own. I never did show you right?" 

Rias shook her head. 

"No." 

Romonus smiled as he walked over to the open field. 

"Alright then, stand back." 

Surtr grabbed Rias and jumped away as when Romonus got Destructive it was not pretty. Sirzechs at this point began to use his Demonic Energy to speed up his movements as he worked through his paperwork at lightning speed. 

He would have to talk to Ajuka to get his computer set up already as this was hell. Luckily, he got finished soon enough and walked over to the window. Without his wings, he jumped down and landed quite next to Sutr, Souji, and Rias. 

Romonus smirked when he saw his older brother. 

"Finish your homework brother? Should I tell Grayfia your slacking?"

Rias looked next to her as she was still being carried in one of Surtr's arms. 

"Hi, brother." 

Sirzechs waved at Rias with a smile.

"Good to see you again so soon Rias. If you must know Romonus I am done with my work. Now, let's see your technique. Souji here tells me it is so amazing." 

Romonus looked back at the open field as his Demonic Energy which was massive from birth was released. Thanks to his Noble heritage he was born with gigantic reserves and training had only elevated them to new heights. 

The Spell of Purification he underwent the Night before also increased the power behind his Energy. He could do more with less and he was going to be using it. From his entire body waves of POD were released which quickly became a massive mass of crimson-black destruction. 

At first, he seemed to just be releasing it wildly, but that quickly changed when he focused on his Energy. Instantly the massive amounts of POD he was releasing spun apart into hundreds of thin strands spinning around him tearing up the field around him. 

The number of them continued to grow as he continued to create more of them. His reserves were enormous so he could keep this up for a long time. He crossed his arms and with just his mind began to control the truly massive amount of giant threads. 

With perfect control, the threads of Destruction began to rapidly cleave the area around and in front of him. Romonus acted as if there was a foe in front of him and uncrossed his arms to use his hands to direct his energy. 

With a move of the hand huge number of threads cleaved through a large area of the field. He then came back with more to reduce everything in a general location to small cubes which then vanished into nothingness. 

He raised his other hand and began to weave threads together into massive pillars which he repeatedly into the same location causing the field to shake. Romonus raised his hands into the air and collected all the POD threads into an orb that fit into his hand. 

He placed both of his hands around the orb while adding more POD and using powerful gravitational energy to force it into shape. Sirzechs focused and felt that this move was going to be good. He started to rub his hands together as Romonus felt it was enough. 

"Since you call your move Ruin the Extinction, I will just call this move The End." 

Sirzechs smiled as Romonus tossed the orb in his hands into the sky. Rias, Surtr, Souji, and Sirzechs looked up wondering what it was going to do. It continued to rise higher until Romonus felt it reached the perfect height. 

He smiled as he snapped his fingers and instantly his orb burst apart. Instantly a massive orb of Gravitational Energy and POD formed in the air. The End was a move meant to destroy everything and already everyone in the city of Lilith could see it.

The gravity of Romonus' move began to pull everything toward it in the air, loose items, anything not nailed down began to fly into the sky. Sirzechs was about to intervene before things got dangerous, but Romonus raised his hand and dispersed it into energy. 

He wiped his forehead as that move was draining. But he could cast another 3 before he was out of energy. He then turned to his brother with a smile. 

"What do you think?" 

Sirzechs thought about it before he smirked. 

"Both of your moves are impressive. Combining Gravity and the Power of Destruction is smart. Can you do that on a smaller scale?"

"Of course. That was just an end-all move meant as a fuck you to everything in a general area. Imagine if I had launched that in the city?" 

Sirzechs raised his hands. 

"Please don't do that. And I know what would happen. I can do the same and more." 

Romonus thought he was seeing things, but he could swear his brother's nose was growing longer. Sirzechs looked to the sky and bragged about his greatness. 

"Your move was strong, but I can do it bigger, stronger, faster, and easier. If I so wanted to I could destroy the whole Underworld if I released the great power contained in my body. Yes, your older brother is amazing. HAHAHAHAHA!"

Rias turned to look at Sirzechs with a deadpan expression. 

'He is off the rocker again.' 

Second, still carrying Rias began to tip-toe away while Souji just vanished. Romonus sneaked away while Sirzechs continued to laugh. 

"But, if you so asked I will graciously train you on how to use your Power just like me. Don't be shy, I do not mind." 

When he looked down the only thing he was left with was the empty field. The wind blew through the field as he looked around. 

"Where did everyone go?" 

Just then he heard what he did not want to hear. 

"SIRZECHS!" 

When he turned around he saw Grayfia glaring at him. She looked at the destroyed field and then at her husband. He raised his hands as he tried to defend himself. 

"Wait, it wasn't me. It was Romonus, he did this." 

Grayfia crossed her arms not believing him. 

"Oh really? Then where is he I heard a giant orb of Power of Destruction formed in the sky. I am getting reports of the chaos and now the field is a mess too." 

"He left. Souji, Surtr, and Rias were here training like always. They just ran off leaving me with the mess. I swear." 

Grayfia looked behind him and shook her head. 

"If that is true, then they should clean the mess. You're lucky your paperwork is finished." 

Sirzechs nodded. 

"Exactly, I got my work done. And my new computer will be ready soon." 

Grayfia smiled at her husband as when he was not slacking off he was a wonderful husband. 

"Alright then, let's find them and make them clean this." 

Sirzechs grinned as he would enjoy this game of cat and mouse. 

"You bet." 

---

Meanwhile, Surtr ran with Rias on his shoulder with a laugh. 

"We are home free." 

Rias smiled as she looked at the giant man. 

"Ice cream?" 

He nodded with a big grin. 

"Excellent idea. The best Ice Cream store in the Underworld is here in Lilith. Let's go." 

He raised his fist into the air as he began to walk, Sirzechs and Grayfia teleported in front of them. Surtr freaked out as he backed away. 

"Uhhh, fancy seeing you here. What do I owe the pleasure?" 

Grayfia walked forward with a serious expression. 

"You forgot to clean the mess?"

Surtr cleared his voice as he raised his arms. 

"Mess? What mess? I have been with Rias the whole time. Right?" 

She nodded. 

"Yeah, we are going for ice cream." 

Grayfia smiled as she pinched Rias' nose. 

"OW! OW! OW! MY NOSE!" 

"You little liar. You are going back and you're going to clean your mess. Sirzechs, you take them. I got Romonus and Souji to find." 

"Right." 

As Sirzechs teleported them back to the castle, Grayfia teleported to her next target.

---

As for Romonus, he began to walk toward Serafall's castle. He wanted to see if she was still doing paperwork by hand or got a Computer. He also wanted to see if she knew about his and MacGregor's summoning of The Harvestor. 

The story his teacher told him was that Spirits of the Spirit Realm could be summoned for single favors or contracted permanently. The Harvestor was a spirit of Death of considerable power. 

No one had contracted him and only asked favors of him. Ajuka would be searching for answers and hopefully, he did not find them. He decided to pray to God, his god. 

'Oh, Rhavdall, god of insanity please look after me, Amen.' 

No pain of course, but just as he was walking Grayfia appeared in front of him. Romonus looked up at the white-haired Devil lady. 

"Hi, aunty, nice to see you again. We saw each other yesterday right?"

Grayfia crossed her arms and smirked. 

"Where are you going?" 

"I was going to visit Serafall, then Falbium, and then Ajuka. Why?"

"You left a mess behind." 

He smiled. 

"Really? My brother's got it handled, but if y-" 

Suddenly he ran off.

"HAHAHA! TOO SLOW!" 

Just as he was running at blinding speeds, he felt a firm hand grab his shoulder and lift him off the ground. The shockwave of stopping so suddenly made him look behind him to see Grayfia. 

"Aunty, you're faster than you look."

"Save it. Now to find Souji."

Souji instead of being caught just gave up and walked out from the shadow of a tree. 

"Fine, here I am." 

Grayfia smiled as this was fun now and then. She put down Romonus before lightly bonking him on the head. 

"Did you cause the black hole?" 

He nodded. 

"I call it The End." 

"It is powerful. Just don't cast it in city limits." 

"Yes, Aunty." 

Grayfia smiled softly. 

"My sister would have loved you. You two were the same. 

He knew her family was a sore subject as they were all dead except her brother. And he was a wanted criminal. Souji bowed and excused himself as he was only here to train Romonus. And he missed his chance for the day because of Rias.

"I will be back tomorrow for Sword training." 

"Thank you, Master. I will look forward to it."

Souji walked off and vanished as if the wind. Once he was gone, Grafyai ruffled his hair. 

"Go visit Serafall, she is quite lonely despite how bubbly she is." 

"Thanks, Aunty Gray."

He ran off, but Grayfia stoped smiling when she heard what he called her. 

"HEY!"

"HAHAHAHAH!" 

She let him run off as that was why she liked him. He treated her just like a fun aunt. She shook her head and teleported back to Sirzechs. As for Romonus, he had a date with a Satan. Hopefully.