Ben 10 belongs to Man of Action Studios and Cartoon Network

Monster Hunter belongs to Capcom

Kuroinu belongs to Liquid (Novel/Game) and Magin Label (OVAs/Anime)

I only own my OC and Ultimate forms

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Opening - Ben 10 Ultimate Alien Theme

https://youtu.be/cxUbzV__dUI

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After having a good night's sleep, Jack headed back to the guild in the morning to take on more quests. The first few ones are pretty simple such as cutting down trees, transporting goods to the market and harvesting crops. Many adventurers would find those jobs either beneath their paygrade or just uninteresting, but Jack is more than to happy to complete those as it would allow them to prosper.

However, while he was thankful of being to able help the people, he knew other people are in trouble. Rape and sexual abuse were the norm in Eostia, whether it'd be monsters or other humans who do the atrocities. And while the the Seven Shield Alliance send help whenever they can, their war with Queen Olga and her monsters severely depleted manpower and resources. What's worse was that there are several nobles who do not do their jobs or leave their villages and town to fend for themselves.

That was unacceptable to him and he vowed to help the people of Eostia. So whenever he's not taking quests, he's out searching for those in need.

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"Oi, shut your damn mouths!" A bandit barked as he banged his fists against the cells of a carriage containing several children ranging from 6 to 10 years old, many of whom had bruises and cuts on their bodies from all the abuse they've taken from their captors. They once innocent eyes were not void and empty, only filled with despair and sadness as many are either taken from their parents or orphaned as a result of them being killed when said parents tried to resist.

Upon hearing the man's angry tone, many quieted down, afraid of incurring his wrath. But others cried louder as a result, making him angry. "Bah, ignore them. They know better." One of the bandits waving his hand off. "Besides, they'll make a fortune when we sold them to the market. Of course, they don't a few spoiled ones here." He said, eye a girl with lust in his eyes, making her whimper and eliciting some chuckles from the others.

While the bandits are busy discussing how much money they'll make or who gets a turn with one of the girls, they were unaware that they were being stalked by a certain Monster Shifter who'd been on their tails for a while. Eventually one of them had to take a leak on a nearby. As he does though, he sees the bush next to him shake, catching his attention.

"What the-" Those where the last words he spoke of before Jack, transformed as Great Jaggi, lunges forward and tackles him to the ground. His screams lasted one second before the Dog Wyvern bites into his throat and tears a chunk of flesh out, making him choke on his own blood.

His scream caught other's attention and they turned to find one of the bandits dead as the Dog Wyvern reverts back to Jack. "Who the  fuck are you, asshole?!" One of the bandits shouted as they prepared their weapons to kill the boy.

"Name's Jack Andros, jackasses. And I'm the hero who's gonna beat your asses and rescue those kids!" He proclaimed, posing as he got the MonTrix ready. His declaration bringing life and hope to the children's eyes as they glance up and looked at him.

"It's hunting time!" He slams the faceplate and undergoes a new form. The dark blue flash subsides to reveal a giant theropod monster with red scales and two rows of blue bony running from his eyes to the tail. Its face resembles a Carnotaurus with thick muscle legs. The most unique feature is its tail that ends like a giant blade. The MonTrix symbol placed on the chest.

"GLAVENUS!" The Slashing Wyvern roars, slamming his tail-blade against the ground as he growls. The children shouted words like, "wow!" "So cool!", and "That's awesome!" while the bandits took a step back in fear before charging at the Brute Wyvern.

However, this was the opening Glavenus needed and waited a few seconds for him to get close before, much to bandits' shock, leaped a few feet and landed right next to the carriage, putting himself as a barrier between the bandits and the children. He puts tail-blade into his mouth and grinds it between his jaws, creating friction that causes the tail-balde to be heated and glow orange as he poised his tail-blade up high.

Three bandits threw spears at Glavenus, but the Brute Wyvern simply slashes them all away.  He then jumps forward and slams his tail blade into a group of bandits, killing most. Those that survive or not hit in vital areas can only scream in agony as the heated tail-blade cauterized the wounds but left them to writhe in pain.

Glavenus then felt something hit the left side of his face and turns to see two bandits using fire magic to try and hurt him. "..... Really?" He was far from hurt nor impressed and counters with a fireball of his own, incinerating them on the spot.

A minute passed by and the bandits were all dead, leaving only the awestruck children and Glavenus alive. He walks up to them but  kept a safe distance to not spook them. "You kids to to the right side, I'll cut the lock." He instructed and the kids did as they were told. With his tail-blade now cooling btu still hot to the touch, he carefully slices the padlock open and used his tiny arms, which were mostly useless in combat, to open the door and let the kids out.

Immediately Jack was swarmed by them, either telling that he was awesome, thanking him for rescuing them or asking about how he transformed into the Brute Wyvern. After calming them down and inspecting each of them to make sure they didn't suffer long term damage, he asked if they knew where they were taken from. Once a few kids told them of the location of the town they were forcefully taken from by the bandits, Glavenus nodded and taps the MonTrix symbol to turn into Banbaro, earning another wave of awe from the kids.

"Get on kids, we're going on a ride." The Brute Wyvern told them and they eagerly hopped to his back as he 

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Meanwhile, a pink and white carriage can be seen travelling on the road with a dozen female Iris Knights riding alongside it, ready to defend the person inside the carriage from hostiles that get too close. That said person was Prim Fiorire. A princess from the Ur kingdom, member of the Seven Shields Alliance and the cousin of Alicia Arcturus from Feoh.

She was on her way back to Feoh after a long yet boring meeting with the council on Feoh and couldn't wait to get back with Alicia. Looking out the window, Prim saw Anne riding her horse in front of the carriage alongside her mother Irene, who was basically an older and mature version of the blonde Iris Knight.

Prim remembered how she and Alicia saw that Anne and Marie brought back a captured dark elf that attacked a village a few days ago back to Geofu and imprisoned. What caught their attention was prior to that, the two Iris Knights were ambushed by bandits and orcs that attacked an escort before being saved by a boy in blue that has the ability to turn into giant monsters with a magical item on his wrist. 

Alicia was skeptical at first after hearing this but brushed it aside. Prim, though, was curious about mysterious person who called himself "The Monster Shifter". Since he's seen occasionally stopping by the village he'd saved, perhaps she can get a closer look and-

A thwack noise was heard followed by a thud and the horse panicking which caused the carriage to shake. "Ambush!" Marie called out as the driver slumps over and fall off, dead as a result of a spear lodged into one of his eyes.

Soon dozens of imps came out of the hiding spots to attack, causing Prim to shriek in shock and hide in her carriage. "Defend Princess Prim with your life!" Irene shouted, drawing her sword and bisecting an imp in half when he swoops down in an attempt to attack her. The other Iris Knights draw their weapons and begin to hack and slash any monster that tried to get their hands on Prim. Anne

And yet for every imp that was killed, two more take his place and the Iris Knights were at a disadvantage with the imps' ability to fly. Feoh was half a mile away from their location and they weren't sure if reinforcements would arrive in time. The best they can do is stall the imps and protect Prim with their dying breath.

They were unaware that someone close by would be their reinforcement.

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"Hmph?" Jack stopped in his tracks to hear and turned his head to where the sound was coming from. He was on his way back to Redbay after rescuing a mayor's wife from goblins and a lost little girl that wandered too far from her town. He was just about to transform and head back when he heard something.

After a few seconds of listening, he realized there was an ongoing fight somewhere nearby. Jack didn't need words and slams the faceplate of the MonTrix, undergoing a transformation. In his place is a giant wyvern with blue navy-blue colored stop and beige underbelly. It had leaf-shaped wings with two antenna-like horns on its had attached to membranes, its tail having the same thing. The MonTrix symbol can be seen on its chest.

"LEGIANA!" The Wind Drifting Wyvern shrieks as he spreads his wings and flies towards the direction of the source.

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"Princess!" Anne yelled in horror as one or two imps bypass their defenses and assaulted the carriage before one of them broke the window and dragged Prim out.

"Someone help me!" Prim cried out as she uselessly kicked her legs in the air before the second imp came to hold her by the legs, restraining her.

"Get your filthy claws off her!" Irene roared as she charged and raised her sword. But the imps' smaller size meant they easily dodged her swing and flew up up. She was bout to swing again, but was forced to block an incoming attack by another imp.

"We're gonna enjoy your screams while we raping you bitch!" The imp holding their lages cackled as they flew up high so that they wouldn't be disturbed and began clawing at her dress.

"No! Alicia, save me!" Prim screamed as they tear her clothes bit by bit, tears streaming down her face. The Iris Knights below were helpless as they didn't have any magic or bows to shoot them down, but even if they did, they'd risk shooting Prim as well.

Just then, a screech echoed from above, catching everyone by surprise and before the two imps holding Prim knew it, something huge slams into them knocking them out of the sky and releasing Prim. The Princess screamed as she fell, but only for a few seconds as something akin to talons grabbed her by the waist preventing her from falling to her death.

Prim looked up in shock to see Legiana as the one who's holding her. "Are you alright there, miss?" Legiana spoke. But before she could answer, she and Legiana saw that the imps are now converging on them including the two that tried to rape Prim in the air.

"Cover your ears , it's gonna get loud." The Wind Drifting Wyvern warned and Prim did as she's told. Legiana's eyes narrowed as the imps draw closer and closer until the time was right.

"You like to hear screaming huh? Then get a load of this!" Legiana rears his head back and gave an ear-shattering shriek that echoed for a few seconds. The Iris Knights got to one knee and covered their ears as they rang, it was unlike anything they've ever heard of before. Still, they are lucky that they were far away from the Flying Wyvern when it happened.

But the imps were not so fortunate as they were the closest and felt the full force of the screech, many dropping their spears and clutching their ears as they screamed in agony, some even had blood coming out of their ears. Legiana wasted no time swooping down and swatting any imp he catches with his wings or tail covered in ice. The moment they regain their bearings, the imps panicked and began to retreat.

Once the threat was gone, Legiana gently lowers himself to the ground until Prim's feet touch the grass and let go of her arms as she sighed in relief and gave Legiana a relieved and curious look. But the moment did not last as Wind Drifting Wyvern found himself surrounded by Prim's guards. "Who are you?" Irene demanded as she pointed her sword at his face, the other Iris Knights drawing their weapons as they looked at him with suspicion and fear in their faces.

"Easy, easy, easy. Friendly here." Legiana backed up and raised his wings up, as if a normal human raising their hands up which intrigued the Iris Knights and Prim as they've never seen a creature act so human-like. Anne, who was standing next to her mother, got a good look at Legiana and thought that his voice sounded familiar. It wasn't until her eyes laid on a familiar symbol on the Flying Wyvern's chest did it clicked for it.

"Jack?" Anne gasped, remembering the name of the person that saved her and Marie back a while ago. This made the others look at her with surprise.

"Oh hey, Anne" Legiana commented, waved his right wing as if nonchalantly talking to a friend. He reverts back as Jack to earn their trust, which stuns the rest. "Glad to see you again. Haven't see you or Marie for a while."

"You know this boy, Anne?" Irene was curious about how her daughter recognize the Flying Wyvern that saved Prim's life. It seems like she was not present when the rumors of "The Monster Shifter" came about.

"They're back!" The moment Anne's mouth opened to say something, one of the Iris Knights shouted and pointed at the air and everyone saw that the imps had return with more numbers and angrier than before.

"You guys find cover in the trees and keep her safe, I'll take care of the little bastards." Jack ordered said as he turns and is about to take transform again, but Prim rushes up to grab him by the arm.

"Wait, you can't handle them all by yourself." Prim said, worried that the large number of imps might be too much for even for her savior to deal with. Irene and the others share their sentiment while Anne remained silent, wondering how Jack would find a solution to their situation.

"Don't worry miss, I'll be fine. This hero stuff is my schtick." Jack gave the Princess of Ur a reassuring smile and patted her head, making her blush as she let go of his arm and Jack uses the MonTrix to become Legiana again. "Besides, there's a time to be a hero....."

"And there's a time to go Ultimate!" Legiana said and slaps the MonTrix on his chest, prompt four diagonal spikes to appear as he transforms again. Unlike previous ones, however, Legiana didn't turn into a different Monster but instead changed his appearance.

His navy-blue skin turns into a fiery red and orange, and beige into white. He doubled in size and the tips of his wings and tail wings resemble that of maple leaves.

"ULTIMATE LEGIANA!" The Evolved Flying Wyvern declared before spreading his wings and taking to the skies again, heading towards the pack of imps coming straight at him.

"Kill that bastard!" An imp shouted as he poised his spear to pierce Ultimate Legiana, the others doing the same as they seek to get revenge from earlier. Many of the Iris Knights down below are thinking Jack is going into a suicide attack, but he gave a smirk and took a deep breath.

"AAAAAIIIIIIIIIIIIEEEE!" Ultimate Legiana gave another ear-piercing shriek. But this time it serves an attack which struck the pack of imps. Most of the imps that were struck head one immediately fell  out of the sky dead as their ears are unable to withstand sound at that magnitude.

"Eeeeek!" Those that survive ended dropping their weapons and wailing in pain as the sonic attack ended up bursting their eardrums and covered their bleeding ears. This gave Ultimate Legiana the opportunity to fly towards them while coating his entire body in flames before ramming into them hard. If the impact somehow didn't kill them, the fire would.

Only less than a minute passed by and the Iris Knights and Prim were in shock and awe as Ultimate had decimated the entire imp pack. The evolved Flying Wyvern then descends down and lands a few feet away from them and reverts back to his normal form.

Prim walks up to him. This prompts the other female knights to walk up to her but she calms them down and looks at Jack, eyes full of curiosity. "Are you by chance 'The Monster Shifter' one of my guards here mentioned?" She asked, referring to Anne whom Jack encountered a while ago.

"Yep, that's me. I'm Jack Andros" He answered. Prim nodded and gave a slight bow.

"I would like to thank you for saving our lives." Prim thanked him. "My name is Princess Prim Fiorire from Ur, cousin to Alicia Arcturus and member of the Seven Shield Alliance." She addressed.

"Just doing what's righteous Princess." Legiana nodded, bowing his head in respect. He then perks as his ears picks up something coming towards them. "Ah, speaking of which, I believe that would be your cousin heading this way."  Prim turns to see Alicia riding a horse with several Iris Knights beside her. It seems that Ultimate Legiana's sonic screech was heard by Alicia and she decided to investigate the source

"Alicia!" Prim yelled excitedly, waving her arm at her cousin and Jack knew that his mission was done.

"Welp, I'd love to stay and chat, but a hero's job is never done. There's still people that need my help." Legiana said before slapping the MonTrix and changes into Volvidon. Before Any of them could ask him, he curl up into a ball and begins rolling in the opposite direction, leaving them stunned.

"So.... care to tell us about your boyfriend there, Anne?" One of the Iris Knight guarding Prim asked with a slight grin on her face after getting over their shock. "He seems friendly with you." At this the captain's face turns red and sputters, denying that that they were seeing each other. Anne's mortification only grew when her own mother interrogated her relationship with Jack which earned giggles from the other Iris Knights and Prim.

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Monster Data

Ultimate Legiana

Species: Evolved Flying Wyvern

Abilities: Able to emit a supersonic screech, trades ice for fire abilities, is now resistant or immune to Fire Element, vulnerability to Thunder Element decreases, able to coat himself in flames

Weaknesses: Is now weak against Water and Dragon Element, larger size renders it difficult to make sharp turns and requires more energy to take off