(Y/n) POV

We stopped in front of the bunker and the two heavy doors were torn open

"So, how far do you think they've gotten?" Armena said getting off

"Probably not very, but I have been wrong before so don't quote me on that" I said cracking my knuckles. We slid down the hall into the main room that I showed RWBY. The windows were blow out and there were numerous black scorch marks on the floor. Strewn on the walls were what was left of knights that were killed, the sight even made Armena cringe a little bit and one was being held up by his intestines

"Are we likely to end up like these guys did?" she said as she had her spear in her hand

"No, it's probably more concerned by that fact that they are even here, besides we both have demonic energy inside us so it might see us as friendly or at least not an enemy" I said and she didn't seem amused by my answer and we found a huge hole in the floor

"Ladies first" I said and Armena just rolled her eyes at me

"What?" I said as she jumped down

"You have wings, you'll be fine" I called out and I heard her let out a loud sigh and I followed her. Now that we were near the heart the air was getting thick and blue mist was covering the ground

"There" and I spotted the holy knights at the entrance to the heart. The entrance was higher up than we were and I jumped up various ledges to get up while Armena flew up. Two guards were behind them but we easily dispatched of them and that Rythian asshole went up the heart.

3rd POV

"Finally" he said and was about to touch it but something let out a loud mechanical roar at him

"The devil?"

"You called?" (Y/n) said snapping the neck of one of the remaining knights and Armena cut three in half

"I'm surprised you managed to get this far" Rythian said drawing his sword, which was a golden hilt

"That's it?" (Y/n) said pointing at it and a white blade came from the hilt

"Oh, light sword, le shit" and Rythian flashed at (Y/n) and swiped at him missing the devil by a hair. He put his blade up at his shoulder and laughed

"Ha, we both know just a scratch from this sword and devils like you are in deep trouble" Rythian said and he spun around and blocked Armena from cutting his head off and he grabbed her arm and kneed her in the stomach. Armena dropped her weapon and coughed up a large amount of blood and he grabbed her head

"I've always wondered why devils even try anymore, we have more and more weapons that can kill you in one shot than there are left of you, it's pitiful really, like putting down your pet dog" he said and Armena shrieked in pain as he started to crush her head

"Let her go" (Y/n) said getting up and he ran at them but Rythian threw his sword and it stabbed inside the devil's stomach. (Y/n) dropped down to his knees with blood pouring out of his wound and he coughed up a equal amount staining his clothes while Rythian dropped Armena and was laughing

"I heard that's the worst pain devils can experience, nothing can even come close to it" and the loud roar from earlier happened again as a huge mechanical centipede came out from the ground. It looked at the three and it let out a ear piercing screech making Rythian cover his eyes

"My my, so this is the heart" he said and went over to (Y/n) who was on the ground. he ripped out his blade and wiped the blood off of it

"Two devils and I can destroy the heart, all in one convenient package"

Meanwhile

Etheria sat on his throne, absolutely furious. Black smoke and fire came from his armor as his bright red eyes glowed and the brimstone that made his throne cracked and his low growl could be heard. His various servants were keen to leave fearing form the demon's anger. He stood up and began walking with fire coming from his steps and he opened the door into a larger room and a red magic circle came around the floor.

(Y/n) POV

"Your allowing yourself to be beaten by some fool" I heard the all to familiar voice of my father say

"No, I'm not losing to him" and I looked up and the entire room was black and he was standing in front of me, billowing with anger

"You haven't gotten up yet, you plan to just wing it this time?" and he knelt down to me and the hole left by that sword closed up

"(Y/n), I'm not above helping you, your my son, I won't ever leave you to die" and I got on one knee

"Then how can you help me, you can't leave Hell" and he stood up

"I've given you something that will let you defeat any enemy"

"What is it?"

"Just stand still, this may sting a bit"

Armena POV

I wiped some of the blood out of my eyes and that holy knight cocksucker drew a new sword, this one was the same as the last and he pointed it at the metal monsters head.

"Finally, now I can-" and he stopped as some black mist started covering the floor. I looked back and (Y/n) looked completely different. He was wearing some sort of armor and had a long sword with a deep black blade (Picture at the bottom). His face was pure black and that holy knight turned to face him

"What is this?" the knight said and (y/n) stood up and he dug the tip of the sword into the ground and stayed silent. The holy knight then drew his sword back and said

"You think that some transformation is enough to frighten me, it will never be enough" and he rushed him. (Y/n) held up his own blade and in a flash he blocked it and punched him in the stomach so that his armor shattered. (Y/n) then grabbed him by the collar and threw him up in the air and he jumped up to his level. He held up his blade and threw it like a spear stabbing through the knights chest and it kept going and it stabbed into the metal monsters head. It shrieked and it whipped it's head around flinging the knight off of it and his body now had a massive cut through his side wide blood pouring out of it. (Y/n) raised his hand and the sword flew back into his hand and he raised it up again. White symbols shined in the black area of the blade and he slashed across in the air and it sent a white blade into the monster cutting it's head off. It made a few roars and shrieks as it's head fell and the body flopped around for a little bit. I tried to pull myself up but I fell back down

"Damn" I said trying again but I was suddenly picked up and (Y/n) was holding me bridal style. The blue lights around us started to flicker and turn off and loud noises and explosions. Various pieces of metal began falling from the ceiling and (Y/n) put my legs down and he held up his right arm and a black circle teleported us back outside. The whole bunker's entrance spewed out fire and the ground caved in about ten feet. I looked back up at (Y/n) and black mist came off of him and he went back to normal. He looked back down at me and said

"Wanna go home now?"

(Y/n) POV

in response to my question Armena pressed our lips together and she shut her bright red eyes and wrapped her arms around my neck. I held onto her waist and she pulled away

"Fine, we can go home"

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here's a picture just cuz I'm nice to you plebs