My first ever crossover story, I'm pretty much new to making one so I hope you guys would forgive me if it's horrible

Note: Ben doesn't change into aliens when fighting (although he can shapeshift into a powerful dragon if the situation needs it which is his most powerful spell), instead, he relies on magic and mana manipulation to fight, all spells are just regular or amplified attacks from the normal series we see on TV

Swampfire – Ben uses either his staff, hands, or mouth to create fire (the staff increases the range) and doesn't need flammable gas to ignite with, the seeds came from his small sling bag (think of it as Charmcaster's bag minus the ugly), minor regeneration but cannot regenerate missing organs or appandages

Echo Echo – Ben can create silicon based clones of himself that can also cast magic to a limited degree, his ultrasonic attacks comes out from his staff

Humungousaur – Ben does not possess superior strength or grow in size, Humungousaur is Ben's familiar, all he has to do is summon him

Jetray – Ben can't fly and has half the speed of Jetray, frequently using this speed for hand to hand combat or for surprising enemies, neuro shock comes out from his staff (he can make his neuro shock laser chase enemies just like Darkside but requires him to be stationary to do so)

Bigchill – Ben can turn invisible, intangible (but needs to be conscious while doing so), levitate, and can use various ice attacks either from his staff, hands, or mouth

Chromastone – Ben can turn himself into an organic diamond, granting him great endurance and absolute defense against telepaths, brute force and energy weapons (like Emma Frost in X-men), whenever struck with an energy attack, he may absorb/redirect/deflect the energy (does not require for him to morph into a diamond)

Brainstorm – Ben intelligence is the same in the series, although he is knowledgeable in the areas of the arcane, he can launch lightning bolts or a stream of lightning through his hands or staff (think of it as a Sith Lighting from Starwars)

Spidermonkey – Ben is agile but not as agile as the real Spidermonkey in the series, his web comes from a gauntlet he wears where the Omnitrix used to reside

Goop – Ben fetches an anti-gravity dish from his bag and throws it, the goo itself will quickly come out of its bad and follow the disk's trajectory, the goo is also acidic (note that the anti-gravity disk is alien tech while the goo is made from alchemy)

Alien X – Ben cannot use the power of omnipotence often, instead, it is contained in an ancient powerful staff that houses which he hid in a different dimension where only he can access it (using it will drain Ben of everything he's got, this is his "Fuck It" move, therefore, is a last resort )

Magic – Ben can use a lot of form of Magic (compile all the spells you've seen in the Ben 10 series), but, Ben still needs to recite the incantations (being ¼ Anodite is not an excuse)

Unarmed Combat – Ben has expert level and knowledge in martial arts (he can defeat less skilled fighters that doesn't rely on unarmed combat like Miss Martian, hold his own against characters with fighting experience like Nightwing, but will lose to fighters with more skills who prefer physical combat like Batman)


New York City January 3, 12:00 mn

It was a cold, quiet, misty night at the New York Central Museum, the museum is currently closed and was having an Indian exhibit on various ancient artifacts, from works of art like paintings, fine jade vases, high quality silken clothes, and decorative symbolic banners, some were equipment from the ancient times, from various weapons made to take the life of warriors and citizens alike, golden daggers with gems fit for nobles and aristocrats, up to armors worn by the bravest soldiers whose name are immortalized throughout the centuries.

But there was one genre of the exhibit that always intrigues both the people and the archeologists, this section houses India's rich folklore and myths, their culture and story represented in physical forms, from various colorful gems that was said would ward off evil spirits, ancient scrolls containing stories of great mythical beast that once roamed the earth, and golden artifacts that are said to be wielded by a holly man.

This part of the section of the exhibit is the most guarded, considering most of them are either made of precious stones and metals or have sentimental values to the people of India that represents their struggles throughout history.

The artifacts are placed at the very center of the museum, the center part of the museum itself was large, 3 stories high to accommodate certain Indian archive's scrolls collection for public display, guarded by state of the art motion sensors, wide camera angled surveillance cameras, contained in a hardened glass that would trigger the alarm silently if tempered incorrectly and are guarded by the New York Police with practiced shifts and are strategically placed in various corners of the section of the room.

A young man of 19 is currently eyeing a certain piece accessory said to trap demonic spirits, the necklace was a blue diamond the size of a 5 year olds fist, the necklace was oval in shape with a masterfully crafted golden lace with small various ancient symbols written all over the necklace, it may look simple but in a near distance can only it be truly be praised for its magnificent beauty, from up close, it seems to have a glow of its own, magnificent, alluring, and mesmerizing, the necklace is contained in a much harder glass container compared to the others and is displayed atop of a 6 ft. pedestal.

The young man has a short brunette hair, forest green eyes, fair skin, a lean, athletic, muscular but slender build, and is standing at the height of 5'9 ft. , his name is Benjamin Kirby Tennyson also known as 'Ben' by his friends. Ben is a Magus of the highest caliber, earning him the runic name of 'the Animagus' by the magical community, although being a Magus means being both a scholar, a politician, and a duelist at the same time, Ben doesn't care much about politics and instead focuses his attention on dueling and a little bit of magical and technological research.

Ben is currently on his Animagus attire consisting of a dark green trench coat with a hood covering his entire face that leaves a deep shadow except for his mouth and jaw area, a dark brown vest inside his open trench coat, a pair of combat boots, black jeans, and a pair of fingerless gloves.

The most striking features he is currently equipped with are his staff that is resting on his back and a magical brown small bag that sling over his left waist.

Ben wasn't so worried about eyeing the precious artifact in the middle of a heavily guarded room as all the guards have been knocked out using his spell that launches a green laser that stuns organic beings, it may sting but it's not fatal, the cameras have been looped prior to the last 5 mins. of his arrival.

It has been recording with no digital evidence on how the guards were simultaneously blasted by a green laser, the sensors were quickly deactivated by breaching the control room and hacking various fail safes, disabling the entire sensors and looping the cameras, this was done by turning himself intangible to enter the control room and stunning the 2 guards on duty before confronting the guards on the heavily guarded area.

The only remaining problem is that the glass container housing the artifact cannot be hacked as it has an independent sensor system of its own, Ben could personally hard wire the pedestal of the artifact but it would take too much time to restart its system and take the artifact, making it too risky, Ben suddenly had an idea, by electrifying the primary circuit board of the pedestal, he could reboot its entire system and start it on back up protocol, but this would lead to triggering the alarm after the reboot protocol is done, although this would make his heist less stealthy, he could just destroy his vicinity and blame a pathetic metahuman criminal as cover for his tactics.

With a cocky smile and a determined face, he commenced his action.

Happy Harbor, Mt. Justice January 3, 12:00 mn

The team was currently assembled in the briefing room consisting of Beast Boy, Miss Martian, Superboy, Nightwing, Blue Beetle and Lagoon Boy.

On the giant holographic screen is their mission briefer, Batman, also known as 'The Dark Knight'.

"The New York City Mayor has just currently asked the assistance of the League to ensure the safe guard of the Indian artifacts currently housed on New York Central Museum where an Indian exhibit event is currently held for 2 days as a sign of trust from India, failure to protect said artifacts would cause an international diplomatic incident with the Indian government causing wide spread mistrust on the United Nation towards the United States".

"So all we're going to do is watch over some boring old stuff?" said Garfield in a bored tone

"This artifacts are known to be selled at prices reaching from a hundred thousand dollars up to millions or even billions of dollars depending on who's buying them, any jewel thief would be pretty eager to get their hands on this 'old stuff' " replied Nightwing

"So we're guarding a bunch of ancient stuff that's worth a lot in a city famous for jewel heists? grande~" murmured Jamie

"Why did the mayor just asked now?" asked M'gann

"Yeah! I was having the best sleep of my life!" said La'gaan in a sleepy voice

"The mayor had a bad feeling" answered Batman in his usual monotone voice

"Wait, that's it!?" asked Superboy in a tempered tone

Batman just gave him a look that they understand as a 'yes'.

With that, the holoscreen turned off signifying that the mission briefing is now over.

"So what's the plan!?" Beast Boy said in an enthusiastic tone, clearly excited for the mission

"This is a stealth mission, we'll divide in 3 groups, me and you we'll be guarding the rooftops, Miss Martian and Blue will be at the halls while Superboy and Lagoon Boy will be monitoring the basement for any suspicious activities, go it?" asked Nightwing with everyone giving him a nod

3 mins. later, they have silently arrived at the top museums roof, the bioship was cloaked then made a hole at the floor for the Team to jump out off, once they've landed at the rooftops, they all gave each other a nod, a sign that the mission is a go.

"Mind link established" said Miss Martian mentally

"Good work, now go to your positions, and keep us updated if you see any suspicious activities" said Nightwing

Meanwhile, Ben was having some trouble with the electrifying the circuit boards as it requires finesse, failing to do so would instantly trigger the alarm, therefore, he has to be careful and making his electric spell's voltage to a minimum, unknown to him, the Team has already been deployed.

Several minutes later, Nightwing then asked the Team for an update "Anything to report?"

"The basements all clear" said Superboy

"Nothing on my side of the roof" replied Beast Boy

"Nothing unusual at the storage area" answered Lagoon Boy

"Coast is clear in the weapons exhibit" said Miss Martian

"I'm heading to the main attraction right now" said Blue Beetle

Upon flying inside the fashion exhibit which is near the Indian Treasure exhibit, his scarab mentally said something to him, a suspicion that something's not right

"Everything looks pretty normal in my scanners, no heat or vibration", the scarab said to look at the cameras, Blue Beetle then flew up and inspected the camera, using his scanner, he found out that this camera has been looping the same scene

"Umm… guys, something's not right about the cameras, looks like they've been tempered" said Blue Beetle

"Looks like someone beat us here" said Superboy

"I'm at the Cultural exhibit, I'll go check the Treasure exhibit" added Miss Martian

"Do not engage the intruder alone, contact us and keep us updated" said Nightwing

"Got it" replied Miss Martian now heading to the Treasure exhibit

Ben has finally rebooted the pedestal's system and is now currently making a circular hole at the center of the glass to extract the artifact, while levitating to the height of the glass, he then touched the surface of the glass with both of his palms and with a bit of concentration, ignited the palm of his hands like of that of a blowtorch, small yet sharp, making a circular shape from top to bottom.

"I found the intruder, he's currently extracting t the artifact out of its container" said Miss Martian while hovering by the top of the entrance in camouflage mode

"How many?" asked Nightwing

"Just 1 as far as I can see" observed Miss Martian

"So whose our guest?" asked Beast Boy

"I don't know, I've never seen his profile at the Leagues Database before" replied Miss Martian

"Must be a nobody..." said Lagoon Boy

"He seems to have powers, he's currently levitating and producing concentrated heat in his palms" said Miss Martian

"… or a somebody" bantered Superboy to Lagoon Boy

"Allocate all your focus to him, Blue, Miss M, BB, and Lagoon, since you're the nearest, you have to stop him before he escapes" commanded Nightwing

"On it" "Gotcha" said Beast Boy and Lagoon Boy simultaneously.

Ben is almost finished cutting through the glass when a voice got his attention

"Don't you know it's closing time?" said Beast Boy now together with Miss Martian, Blue Beetle, and Lagoon Boy

"I don't see any close signs anywhere" replied Ben now facing the group

"Nightwing , we're about to engage him in combat" said Miss Martian to Nightwing

"Make sure to secure all the artifatcs, do not damage them" ordered Nightwing

Beast Boy then turned into a bull and charged at Ben, using the same spell he used at the guards, he blasted a green neuro shock laser from his staff to Beast Boy, with the Bull's bigger figure, it was difficult to dodge such a small and accurate shot, the ray hit Beast Boy at the left side, knocking him back while being both momentarily dazed and stunned

"Ugh" groaned Beast Boy

Blue Beetle and Miss Martian flew towards Ben, Ben then grabbed something from his left bag, he then threw seeds at the front of Blue Beetles's flight route towards Ben, it then rapidly grew into thick vines and quickly entangled Blue Beetle

Miss Martian dodge the vine's swipes and diverted her flight path at the top of Ben, getting ready for a telekinetic attack, Ben seeing this conjured fire out of thin and air and surrounded Miss Martian, the flames then combined together then formed a spherical barrier around her, aerially trapping Miss Martian, with her Martian physiology, it wasn't long until she fainted and crashed at the coffee table below her, breaking it into many pieces

A sneak attack was set up by Lagoon Boy in his inflated form mode from behind Ben and was effectively dodged with Ben by side stepping and doing simple dodges while Lagoon Boy delivers punches after punches with no progress

"Using Atlantean sorcery to augment your physical abilities, not bad…" Ben cockily commented while dodging Lagoon Boy's punches, kicks and swipes

"…. but not good enough" said Ben launching an electric spell from his hands on Lagoon Boy, electrifying him until he collapsed

"I guess that's all of them" Ben said while looking at the passed out heroes

"There still me amigo!" said Blue Beetle floating at the front of Ben

During the clash, Blue Beetle managed to cut all the vines entangling him, his hands then transformed into a pair of weapons then fired his twin supersonic cannons at Ben

"Hey! I can do that too!" exclaimed Ben using his own ultrasonic spell emitting from his staff, when the two sonic energies clash, a sonic boom occurred, destroying all the glass containers in their area, with the continuous sonic clash, the two energies fought for dominance until Ben's spell overpowered him slowly

It was then that Blue Beetle knew that he was outgunned by Ben, he was then his by the full force of the spell, launching him across two other rooms away from the exhibit, Ben looked at his handy work and saw how much havoc their clash has done

"Darn, now my stealth record is ruined, oh well… no use crying over spilled milk", he then went over to the pedestal to grab the artifact

Upon holding the artifact, a boomerang suddenly hit the necklace, launching it a few meters away from him

Superboy then bended over and took it from the floor with NIghtwing on his side

"Don't you know it's not nice to take things without asking permission?" teased NIghtwing.

There was a vibrating sound at Ben's pocket, he then grabbed his phone, there was a warning signal that the police are on their way, with no time to waste, Ben grabbed a flat circular device and threw it in front of Superboy

The device hovered 6 ft. off the ground, next that came out from Ben's bag is a green goo that transformed into a humanoid goo below the device, the goo then launched itself at Superboy, completely entangling him, brute force seems to have no effect on the goo as it would just quickly entangle him more, Superboy's struggle caused him to drop the necklace

Ben used several lightning bolts spells in quick succession at Nightwing to distract him away from the artifact, with several graceful acrobatic flips and maneuvers and using several furnitures as shields, Nightwing was now close to the artifact and was about to grab it, a web then instantly shoots and sticked itself up and snatched the necklace away from the his vicinity, upon closer inspection to Ben, he is now equipped with what seems to look like to be a small black-golden spider-like gauntlet on his left arm

"It's been fun but I really have to be going" said Ben in a playful tone

And with that, a red portal appeared at his back, he then entered the portal right before the cops entered the building

When the cops investigated the Treasure exhibit room, they saw total chaos everywhere, all the glass containers are shattered, the ground and several pillars have cracks, there was a nasty overgrowth, and broken furnitures everywhere, but no heroes, just several unconscious guards

It was at Ben's escape did the Team made their 'disappearing act'.