So, what would make Jaune Arc, probably the less manly of the cast of RWBY, into a badass Grimm Killing machine? That was the big question I had in mind as I started work on this fan fiction. Many ideas came to me, including Cursed Sword, Demonic Ritual (Yes, that crossed my mind... Blame Yandere Simulator), and even Time Space Manipulation. But that always led to me having to ask you all to suspend the disbelief you have. But then I started to think:

Whatever would it be like to have a Grimm mask that was... ancient? So old, it would predate even that dragon Grimm from the end of Volume 3? Why do the Grimm have masks in the first place? That last question actually really bugged me. It's never been explained... so I decided to resolve that with THIS story!

That's not to say I will be able to give a complete, perfect answer. Believe me, the only answer is what ever was within the mind of the one and only Monty Oum (Rest his perfect, kind, awesome soul). BUT, I will say where I got the inspiration of where I got the powers of the mask: Bleach, [Protoype], and even a pinch of Soul Calibur. Now, they all probably are making you think "How could those things even blend into a comprehensible idea? Sanji, you stupid moron, this idea sounds terrible!"

Well, it's an attempt to be somewhat original... I might very well fail, but half the fun is making a story! Fail or succeed, its the fun of making scenarios for a hero to pass through, either alone or with help from others. Jaune, even though he is gonna have powers, is still going to have times where he fucks up. It's part of his nature! But then again, he's not gonna be alone, suffering on his own...

Not for long~! Hehehe...

Oh, and before I forget: I do not own X-Ray Man, RWBY, Naruto, One Piece, Undertale, Devil May Cry, or any other references that may or may not be made in this story.

Chapter 1:

Awakening The Masque, Becoming the Dreadnaught

'In hindsight, I think I would have preferred to go with them on that mission... How did I end up thinking that a job of sorting crap for Professor Port would be even remotely fun?' Jaune sighed as he picked up a large box of papers, hefting the heavy container over his head onto a shelf. For three days, his team had been planning to go on a two week mission to scout out a Grimm, with Professor Port and Doctor Oobleck acting as their supervisors. Pyrrha, whom was the second in command if you asked Jaune, had been trying to convince the knight to go with them up until she stepped onto the Hammerhead.

'Yea, send me to a place where a new species of Grimm has been sighted... I can't fight, I am not close to being fast enough, and I scream like a girl... I'd end up being lunch to one of them, most likely. I am glad Pyrrha takes time out to help me train, but... UGH!' With a grunt, Jaune put the next heaviest box onto another shelf, then sat down on the rest, shaking his head.

Team RWBY and NPR were much better off without him to worry them. They had skills to handle Grimm on their own, while he... he could barely fight off one stupid Ursa. Nora was a freaking powerhouse, able to take down tons of those monsters with only her hammer. Ren, he was like a ninja when it came to stealth tactics, and could take down a King Jupiter by himself. Pyrrha, however, was the ultimate Battle Maiden, and yet she always tried to help him out. Even after the stupid crap he pulled on her, she remained his friend.

With a huff, Jaune slowly stood up from the boxes and began trying to shove the rest in the right areas as fast as he could.

"Stupid... dump... box trap! I swear that the shelves are getting small-"

CRASH-INKLE!

Jaune's eyes flew wide with horror, as the last box he pushed into a shelf crashed into a second box... and sent it to the floor. Made of glass, it had shattered upon hitting the concrete floor of the storage room. Immediately, the blonde knight felt his stomach drop onto the floor, possibly breaking as well.

"...Goodwitch is gonna kill me...!" With a dash, he grabbed a nearby broom and dust pan, quickly sweeping up the glass that he saw with a bite of his lip. Jaune did not mean to break the case, but in his haste, he had probably destroyed some very important part of Beacon history, or even Remnant History! Oh, he was so...

His eyes landed upon what the case held, and felt his worry vanish, consumed instead by curiosity. As big as his face, with only eye hole, was a mask. It was white with red lines that made it look a bit like a circuit board. Where the mouth would be located, the red lines made a circle, before splitting into three short lines that caressed onto the chin of the mask. Where the other eye would be, a second circle and more lines were placed. Over all, the mask looked a bit like something one of the White Fang would wear, but it was more... in depth. It was as if this mask was the first of its kind, inspired by a Grimm made human.

Suddenly, the door to the storage room creaked open, and heels could be heard moving down the aisles with moderate speed. Jaune quickly shoved the mask into his hood and tightened the strings to hide it from view, before grabbing one last box to put it away. As he did so, Goodwitch appeared, her usual look of guarded study, as always, on her face.

"Mr. Arc, I see you finished the job early... Since you did so well, I feel it would be appropriate to remind you about dinner, lest you sleep through it again." Her voice, that teaching kind voice, it sent a bit of a shiver down Jaune's spine. He would never admit it aloud, but she scared him whenever she spoke to him. Though she had a lovely figure, she always had this way of seeing right through a person and making them feel worthless. For someone like Jaune, that wasn't very hard.

"Ah, yes, Miss Goodwitch! Oh, erm... I broke a glass case, but it was empty, so I just cleaned up the glass. I am really sorry! I swear, it was empty, though!" He had no idea why he lied and said it was empty, but he had the feeling if she knew he hid it in his hoodie, she would strangle him... or worse. With a bow to her, he quickly dashed out of the room, leaving behind only the glass, Goodwitch... and the feeling of being in trouble for now.

Sighing to himself, Jaune looked at the mask he had taken from the storage room. After having eaten his dinner, the leader of team JNPR had walked around campus, trying to find a way to discreetly put the mask back before Goodwitch came around asking him questions. But every time, he would have to avoid her. Soon, night had fallen, and curfew meant that he was stuck in his room.

"If Goodwitch finds out.. she's gonna kill me...!" With a shiver, Jaune stroked the edge of the mask, frowning as he turned it side to side in his hands. Pyrrha would be disappointed in him, that was for sure. He cared about his friend, and knowing how she would react was driving him crazy. With a sigh, the blonde knight began to put the mask down, before blinking. Well, a mask WAS supposed to be worn, right? What was the worst it could do?

Slowly, taking the mask by the sides, Jaune lifted the mask to his face and placed it there. At first, it seemed to unable to stay... but the moment his skin came into contact, he felt it seem to cling to his skin. Not tightly, not enough to make removal impossible, but it wouldn't slip off. His one visible eye looked around the room, and Jaune felt... a little disoriented. For a moment, he could barely handle standing up straight as his one eye was unable to see anywhere. But after a moment, he realized that he was keeping one of his eyes closed.

Confused, he opened his other eye.. and suddenly, he could see out of both eyes.

'But the mask only had one eye... so how can I see with both eyes?' Jaune frowned and slipped toward a mirror, looking at it with a large frown. The mirror showed... well, the mask on his face. No big changes, no visible eye hole, just the one eyehole. Waving his hand in front of the mask, the blonde knight felt a bit... confused. With a sigh, he slipped the mask off his face, before glancing it over slowly. "Hmm... Must be like a mirrored eye hole or something..."

Shrugging, the blonde knight put the mask down on his nightstand, before hopping into the shower. Cleansing himself of the dust and dirt from the day, then dressing himself in a white shirt with navy blue boxers (Nora had destroyed his onesies) Jaune began to think about both of the teams he came to cherish.

Ruby Rose was probably the sweetest girl he'd ever met, so much so he would have begged to be her older brother... except Yang would probably kill him. Her fiery temper was matched only by her beautiful form, and Jaune had to repress a shudder as he thought about her going supernova on his ass. Blake Belladonna... he had been told by one of her team mates that she was a Faunus, but that didn't really make Jaune all that affected. She was still the cool, quiet book reader he came to admire as a warrior. Of course, she was being sought after by Sun, a Monkey Faunus that Jaune... actually found pretty cool. The two of them talked a few times, mostly about stupid things, but it was nice. But even as he thought about Sun, a new girl took form in his mind:

Weiss Schnee... the Snow Maiden of Beacon. Those beautiful eyes of hers were perfect orbs of ice blue, and her faint scar only made her more perfect. Her grace was just as incredible, and made Jaune feel butterflies in his belly. Sure, she was a bit... ok, more than a bit cold, but that's because she was being seen as just "Schnee", not "Weiss." Not the girl who could do incredible feats with her glyphs. No one else tried to see how she could make incredible plans without much worry. No one else bothered to enjoy that perfect pitch singing voice... Jaune had fallen head over heels for the girl, and she wouldn't give him the time of day. It didn't matter, because he would work to earn her love. That was an Arc's Promise, and an Arc never went back on his word!

The mask, still in his hands, seemed to feel like a warrior's mask suddenly. So, sliding it back on, Jaune picked up Crocea Mors slowly, holding the sword upward in a knightly way. Looking back in the mirror, he felt... a bit awesome. Staring at the masked warrior, Jaune gave a single swing, then a second one. Each one made him feel more and more like a real hero, as if his destiny was being made closer by just wearing the mask. Striking a pose with his sword, shield, and the mask, Jaune glared into the mirror.

"I, Jaune Arc, shall become the Hero of Remnant! No more shall any one feel the fear of evil, nor shall I abide the tainted hatred of those who would destroy peace! I shall protect everyone, Faunus and Human, from the Grimm, White Fang, and all forms that evil may take! I swear this tonight! This, I shall vow upon my sacred name and my ancestors!"

As he stood there, staring at the mirror, Jaune felt... a bit embarrassed. Slipping the mask off, as well as putting his sword and shield away, the teen yawned and began to slip into his bed. Oum knew, if anyone had actually seen that, he'd be the laughing stock of the school. But as he remembered that strange vow, Jaune had to admit... he felt a little stronger and more badass over saying it.

The next morning, Jaune felt... extremely hungry. Sure, his metabolism made him hungry for a big breakfast every night, but this felt like the time he had skipped out a whole day of meals to get revenge on his sisters for planting a fake cockroach in his Pumpkin Pete's cereal. This really sucked, being so hungry. With a grunt, the blonde knight walked to the bathroom, holding his clothes for the school day ahead of him.

Dropping his boxers first, he glanced at the mirror... and screamed.

"WHAT THE HELL HAPPENED TO MY DICK!?"

Nothing bad, of course, but what did happen?! Suddenly, he had gone from being slightly underwhelming... to being a python of love! His eyes were locked on the image before him, before he touched a finger to the base. Sure enough, it was real. He had to be at least TWICE... no, THREE TIMES bigger than he went to bed with!

Stroking a hand over his chest, Jaune felt his cheeks heating up. His body was more muscled, but only by a good size or two. He wouldn't attract too much attention due to his baggy clothes, but he had definitely gotten more... muscular. He originally had a bit of a light weight boxer getting to midweight, but over night he had suddenly gotten enough muscle to push him toward the middle of that area. Stripping off his shirt,he had to examine his whole body.

Incredible as it was, Jaune looked... he looked like he was a sort of model, body wise! His chest was pronounced to show larger pecs, his stomach had 8 squares of washboard abs, and his arms were more muscled, defined to the point he looked really strong! He felt... really hungry, however.

"What did I eat that did this!? ...Wait, could the mask... No, no! This isn't a dream, but I know there is no way that mask- ...Wait, where is the mask?!" His head ducked back into his room, as the blonde goofball began to search through his room with rapid pace. His eyes scanned the desk, the night stand, everywhere, to no avail. But Jaune's luck was even worse, as the door opened to show Goodwitch outside.

"Mr. Arc, I came by to- OH LORD OUM, I AM SO SORRY!" The blonde teacher turned a dark red and slammed the door, before Jaune could even cover himself up. Embarrassment flooded the blonde knight as he slowly dressed himself up.

"Well, this day is getting better and better..."

Jaune flicked his fork over his plate, frowning as he swirled his silverware around a puddle of syrup. He had devoured down not one, not two, but seven stacks of pancakes, three large plates of eggs, two plates of bacon, and a huge bowl of cereal, with three glasses of milk. However, even after all that food, his mind would not leave one subject alone: The mask.

'I could have sworn that I put it on the night stand last night...Did it fall off and roll under the bed? No, that's not possible... maybe Goodwitch...? But then why would she come back to my room in the morning? This makes no sense! Ugh... I need help, and not just figuring out why I can eat more than my sisters combined...'

Jaune sighed and stood up to put his dishes away, when he heard laughter. Off to the side, with their hands pulling on Velvet's ears, Cardin Winchester and his team were messing with the Rabbit Faunus. The poor girl was looking very much in pain, but none of them would let up.

"Hey, Cardin, you ever think of training this girl to be a good little pet?"

"Ah, now that sounds like a plan, Sky! What do you say, animal? Why don't me and the boys try and give you some training? You might like being collared up and everything!"

Jaune felt angry as he watched them tug on her ears, Velvet's cries of protest filled with her tears as they pulled and yanked away. For some reason, Jaune felt... angrier than usual. Sure, seeing a girl get hurt made him feel upset, but this anger was stronger. He felt that it was too much to stand by. Why was he just standing there, watching? He should go over there and tell Cardin off!

Jaune put his dishes down and gripped his fist, before slowly walking toward Cardin, his eyes narrowing down. But as he got close, Russel grabbed his arm and grinned.

"Hey, Jauney Boy! Don't worry, we just are playin with this little fr-"

WHAM!

Jaune's fist made contact with Russel's gut so hard, the boy was sent flying backwards into one of the columns. Cardin, looking up, gritted his teeth and let go of the Faunus girl, before grabbing his mace. Sky and Dove took positions to his sides, looking just as mad as their leader.

"So, Jauney boy wants to play knight in shining armor eh? Fine then... you can take her place, ya-" was what Cardin began with, punching toward Jaune... who bent over backward and dodged with a frown and wide eyes. The fist had started moving toward him, but then it just seemed to go as slow as a turtle.

Dove, blinking, tried to kick at his head, but the blonde knight did a one hand stand before grabbing the male's head with his feet and slamming him into another table. The other students, seeing the fight, began cheering for Jaune, while Velvet stood with her tray in her hands, eyes wide with shock.

"Hold... still!" Cardin's clumsy punches were nothing to Jaune, who dodged side to side with his hands in his pocket. Feeling a bit cocky, he gave a small grin at Sky, who tried to kick out his legs. The teenage knight only jumped upward, and delivered a split leg kick against both boys. Sky was sent into the crowd, who dodged the teen missile with a cheer. Soon, only Cardin and Jaune were left.

"Ok, you son of a bitch! You got skills, eh? Let's see you handle real weapons!" With that, the bully pulled out his mace and swung wildy. Jaune merely lifted his hand and grabbed the mace's head bare handed.

"So, me defending a girl from you, a bully who can't even get a girlfriend, makes me a son of a bitch, yea? Seems a bit reversed, if you asked me."

"OOOOH! Sick burn!" Sun's voice was heard in the crowd, as the other students began laughing. Cardin's face turned dark red before he yelled and pulled his mace free.

"YOU SON OF A-!" was the last part of Cardin's retort before Jaune pulled his fist back and punched him in the face. The result was that Cardin went flying into a table, crashing through it, and then slammed into the wall, leaving an indent of his whole body. Jaune cleaned off his hands slowly, feeling a bit... proud of himself, before walking over to Velvet.

"You alright, Velvet?" The girl stared at Jaune, before ducking her head down and nodding slowly. Shy as she was, she was a nice person and it made Jaune feel proud to help her. So, with a smile on his face, he took her tray of dishes, as well as his own, and hummed while putting them away.

Today... suddenly seemed less dark, especially when he did that to his former bully AND defended a girl from said bully. The mask could wait... this was awesome!

Alright, hope you liked chapter one every body! Chapter two is gonna be up soon. Also, the poll for Jaune's harem is still ongoing, so please vote ASAP!