Title: Blood Bond

Summary: Trapped with his classmates in the school during a blackout with a storm raging outside, Marco didn't think it could get much worse. Until Janna uses his blood to try and summon a demon…it was when one actually appeared that life got worse. Now, blood bonded to a usurped demon prince, Marco has to decide whether or not he wishes to involve himself in this Monster-Mewni war and with the demon, Tom, himself. Though...it doesn't look like he has a choice in the matter. And what's up with Star?

Word Count: ~4000

Disclaimer: I do not own Star Vs the Forces of Evil, but man…it'd be great to even meet the creator…

Notes: Been wanting to write some TomCo! But many of my ideas just didn't seem to fit…and, also, with all the speculation behind Toffee I didn't want to make any assumptions because the entire world of Star Vs the Forces of Evil could change just like that. Regardless, I wanted to post this First Chapter, maybe Two, and see what type of response it gets (also, I'm a college student, so I'm sorry but this isn't my first priority even though I dearly love this fandom and TomCo). So, Review if you Enjoy and Want More!

Note, Flames are ignored. Just point blank, ignored. Constructive Criticism and Theories are MUCH Appreciated, but Shipping Wars and Rudeness shall be deleted. People post on here because they want others to enjoy their work, it's completely your choice to click on it at all so please don't make it into an assassination attempt or WW3.

Update: Some grammar and spelling corrections; still working out the kinks after all.

Warnings: Alternative Universe, Language, Violence, Blood, Emotional Angst, etc.

Tags: Alternate Universe—Star Never Got Wand And Is Hiding On Earth—Toffee Vs Mewni War—Toffee Being A Brilliant Jerk The Past Three Years—Slowburn TomCo—Blood Bond—Janna Needs To Stop Messing With the Supernatural—Blood Moon Ramblings—Time Is A Bit Different Than Canon—Marco Suffers A Lot—I Enjoy Emotional Angst—

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~~~~~~Chapter 1: There Are Worse Things Than Being Trapped At School~~~~~~

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Marco couldn't think there were many worse things than being trapped at school. Besides being trapped with his classmates. In the middle of a blackout. And literally trapped since there was some sort of hurricane going on outside that was flooding the streets and literally making this place harder to reach by their parents than the other side of No Man's Land.

Still, there could be worse things…but when Janna, his seventeen-year-old classmate who was obsessed with the occult and supernatural, came over and cut his hand deep enough that it began to bleed—it was then that he decided enough was enough.

"Ow!" He quickly drew back his hand, glaring as deeply as possible as he could at the obviously psychotic Janna Ordonia. Sure, at first glance, she didn't seem that bad. Perhaps a bit mischievous looking with her short dark-blue hair, smirking brown eyes, olive green beanie hat, and punk rock clothing in the form of red checkered pants, tight black shirt with the word 'Nirvana' printed with yellow letters, black gloves, and various piercings…but Marco, who had known her when she was an equally insane pre-schooler, knew that the girl before her was nothing but trouble. She was a bit of kleptomaniac and somehow had all his personal information—leading to awkward calls and denials that he 'ever contacted this business and no I do not want a macabre baby doll' and 'no, Sir, I'm not trying to insult your…business…but I have no need for ruby colored handcuffs'—so, the fact that she had his blood right now was very alarming.

"Why in the world did you do that!?" He held his hand close to his body while already going to his pre-packed medical kit in his backpack. Since his housemate, Star, had come to live with them three years ago, he found that carrying bandages, disinfectant, and various medical ointments were essential to his sanity and future health. Also, he was admittedly very fond of being hygienic and enjoyed being able to disinfect his hands to prevent bacteria build-up. "Really, Janna, I'm really not in the mood."

Janna held her hands up in mock defense. "Chill out, Diaz," She said with a smirk that did not make him 'chill out' in the least. "I'm just using your blood to make a demon summoning ritual circular."

...He just gawked at her for a moment before realizing that she was serious. Well, of course she was serious! This was Janna! The same girl who wanted to become "BFFs" with a living skeleton and performed seances with his best friend every other weekend. Oh God, he had to stop this.

Instead of saying something snappy, or at least mature and heroic, his next words came out rather…whiny. "Please, Janna, can you not tonight? I draw a line at you using my actual blood—which, seriously, that hurt—and isn't this night terrible enough?"

With his uninjured hand, he gestured around the gym which was full of their fellow classmates, lower grade students, and instructors. Since they had been basically forced to do a 'school-wide sleepover,' they were divided off into their individual corners and gender groups—he was sssoooooo thankful that everyone had at least listened to that—before being fed by the Culinary Club about an hour ago. Aka, they were given cans of things like peaches or tuna while being served crackers on the side. Blackout, remember? No electricity to supply the kitchen. If so, he could have cooked. Well, he supposed he could have…like he could have made the canned food and crackers more appetizing…but he really didn't want to get roped into feeding the entire student body. As a result, he pushed down his conscience and dutifully accepted the questionable non-perishables.

Janna shrugged. "That's why I'm trying to make it more interesting!" Why did she have to sound so reasonable? Especially when every word out of her mouth was insane? "I would have used my own blood, believe me, but this particular spell calls for the 'Blood of a Virgin' and all."

Marco turned bright red, a state which only increased when he heard the snickering of some ninth graders a few feet away playing some sort of dice game. "Would you shut it?" He hissed, trying to calm the raging blush on his face. "And, I, I mean—"

The Filipina put on a mock expression of comfort. "There, there, Marco," She cooed in a way that was the exact opposite of soothing. "I'm sure some girl will be able to penetrate that iron fortress you got going on there and get you laid. Or, I suppose, some guy—"

"Shut up!" Why, oh why him!? This night couldn't get worse. He would do anything to get off the subject of his…relationship status…and to anything else. He'd probably regret his next words, but anything was better than Janna making her usual provocative statements. "What is the blood even for?"

The dark-blue haired girl grinned beckoning—a very reluctant—Marco over from his spot—he made sure to grab his backpack, those ninth graders had been eyeing his stuff—over to where she literally had what looked to be a ritual circular. Luckily, or perhaps not luckily, it wasn't made from blood but instead drawn with what looked to be powder and ash with a ceramic bowl in the center and candles placed at the intersecting lines. Marco would ask where she had gotten all this stuff…but he knew for a fact that she carried it all with her on a regular basis or in her locker, so he didn't bother.

"This," She said, rather proudly. "Is my latest attempt at summoning a demon!"

"Why would you even want to?" While Marco had never met a supernatural creature in his life—and wasn't even sure if they existed in the first place—he found that he was quite content with never meeting one. Honestly, with Star, he got all the excitement he needed in life. Add Janna to the mix, and his life was a regular rollercoaster of thrills. "Aren't they, well, evil?"

Janna snorted, shaking her head as if a teacher instructing a foolish student. "Now, now, Diaz," She spoke in a patronizing tone. "Is it really fair to judge a species or person you've never even met? Where's that 'culturally-accepting' and 'fair-minded' Safety Kid that we all know and love?"

"Don't call me that," He said with a scowl, staying true to the idea that he was misunderstood Bad Boy. While he wasn't as insistent upon escaping the title "Safety Kid" as he was at fourteen—there was nothing wrong with wanting security in life—he firmly rejected the idea that he couldn't be exciting and adventure seeking. After all, just last week, he had willingly gone with Star forty miles to some bizarre that she wanted to see. Those people were certainly sketchy and constantly made him redirect Star's path of destruction! See, he was always involved in dangerous things! "If I meet a demon, and he or she is fine and not trying to eat me or whatever, then okay. Otherwise, I'd prefer not going out of my way to interrupt their lives. Ever think that whatever demon you're trying to summon doesn't want to be summoned?"

Janna shrugged. "Guess we won't know until we try it. Jeeze, you're definitely high-strung today, Diaz. Is it because Star is home with a cold?"

Marco scowled at the reminder of his friend's sickness. Honestly, it was a big part while he was so upset about being stuck at Echo Creek Academy. His friend didn't get ill often, but every time she did she was strangely secretive and refused to let him into her room at times. It was never as bad as that one time, a little bit after she came to live with them, she had left school and barricaded herself in her room for a literal day before coming out and acting as if everything was fine. Since then, and with Marco's natural over-protective tendencies, he tried to be able to do whatever possible he could for her when she was ill. She might not always let him in, but he could make food, bring her blankets, entertain her from outside the door…yeah, he was a bit of a mother-hen.

It was actually yesterday when Star had gotten sick out of the blue. They didn't know what caused it—they never did—but she had claimed to be fine, just needed to have some of Marco's delicious Paleo Chicken Noodle Soup and lots of Banagic ice cream—he tried to tell her that eating dairy while ill wasn't a good idea, but the girl was addicted to the stuff. So, he had left her home yesterday, and today, but it was today that this freak storm had come out of nowhere and trapped them here. So, if he was a little nervous about spending the night here, even while knowing that Star was in the perfectly capable hands of his parents, then excuse him.

"You cutting me—that knife better be sanitized—isn't making me any more chipper," He replied a bit sarcastically to her question, causing her to snort. "So…" He gestured towards the ritual circle, knowing that nothing was going to stop this girl now. The fact the teachers hadn't even blinked in the direction of this…thing…was proof that nothing would stop this horribly timed—of course, in Marco's opinion, any time you try to summon a demon is horribly timed—ritual. "How's this work?"

Janna grinned at his perceived 'interest' and puffed out her chest. "This one is really intricate," She bragged. "It might not look like it, but there are tons of Runes beneath all that ash and powder and that bowl in the middle is filled with herbs and essences that cost me a fortune to find. I've been preparing this one for months and it was either tonight or four weeks from now that I had to do it."

"Why tonight or one month from now?" He asked warily, wondering if he wanted to hear the answer.

Janna gestured towards the sky. Or, rather, the roof of the gymnasium where the sounds of rain and wind could be heard furiously pelting its walls, but he knew what she meant. "The moon," She explained. "It's exactly one month before the Blood Moon."

"And that means…?"

She snorted. "It's the New Moon, you dolt. Which means that it's basically the 'reverse' of the Full Moon, the beginning of the twenty-nine and a half day cycle before the Full Moon which, in this case, is a Blood Moon. It only happens every 667 years!"

His brow furrowed, the smell of ash reaching his nose as he reached up to rub it. "Then wouldn't you want to do it on the Blood Moon? Sounds more important than just some random New Moon."

She rolled her eyes. "Like I said, the New Moon is basically the reverse. It's when it is directly in line with the sun and invisible from Earth. It means that the energy that will supply the Full Moon, the Blood Moon, is directly available! During the other phases of this month, it will only be at partial power before reaching double its maximum with the Blood Moon. It's really serious stuff, Diaz!"

"I'm…not sure that's exactly how the Lunar Cycle works," He said slowly, a crinkle in his forehead from the sheer fact he was attempting to understand all of this. "But I suppose I get what you mean. But why not wait for the Blood Moon if it's twice as powerful?"

"I wanted to see if this ritual works," Explained Janna. "And, if not, I'll make changes and re-do it for the Blood Moon."

"Blood Moon…" He tasted out the name, grimacing. "Why do I feel that's not a really 'good thing'?"

She snorted. "It's fine, you dolt. In fact, a romantic like you would probably love it. Apparently, if you're hit by its direct ray with another person, you're bonded for eternity. Like, souls and everything."

"That sounds terrible," He deadpanned. "But, if the New Moon is the 'reverse' or whatever, then wouldn't it have the opposite effect of and 'rip people apart' or whatever?"

She shrugged, walking around the circle and beginning to light the red candles placed at the line intersections. "I don't think so, 'reverse' was probably a bad word to use, I meant that more in the whole 'type' and thing. It's the same energy after all."

"And I bet you're hoping that this energy will connect you with some demon," Slowly reasoned out Marco, slowly confirming to himself that, he was right, and this sheer insanity. "Yeah, I was right, this is a terrible idea." His eyes widened. "Wait, if you're using my blood, does that mean that you're connecting me with a demon!?"

She rolled her eyes playfully, hitting him on the arm—he winced, hadn't he suffered enough today!?—before going towards the center of the circle with the strange dagger. "Nah," She explained. "Natural Demon-Human bonds are, like, non-existent. I'm honestly just using your virgin blood—" Oh, God, would she stop saying that!? "—as a sort of 'neutral sample' in this. Plus, the Runes I put underneath the charcoal should probably change what I'm summoning a bit—or make it stronger, who knows? I'm not really sure."

"Wait, what?"

Before he could say another word, Janna had flicked a drop of his blood into the bowl.

It was then, when sheer chaos was released, that Marco really wished he had just stayed home.

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"Not so smug now are you, Brother?" Sneered a voice from on top of him, pressing hot steel into his already burning and scarred back.

Still, it didn't stop the lavender-skinned demon from snarling at the traitor above him and trying to call upon his flames—but it was no good. The bastard, and his fellow radical devotees, had somehow sealed his access to his Magic. While Tom wasn't useless without them, being literally backstabbed and attacked 200 demons raring for his blood to 1 made the odds…a bit more lopsided.

"You're no brother of mine, Caiaphas," Spat out Tom, struggling against the burning asphalt beneath him and trying to focus on something other than the mocking jeers of this freak's entourage surrounding him. He had…been slightly bested…about an hour ago. But, instead of quickly ending his life, Caiaphas had spent said hour further beating and mocking him for all to see.

Speaking of all to see, Tom couldn't help but glance at the corner of his eye where the Throne of the Underworld resided…as well as its ruler, Abbadon.

Also known as…his father. And, sadly, Caiaphas's father. He also had a lot more half-brothers and half-sisters, but he personally didn't keep much track. He had been the royal heir up until now, and his siblings were literally all jerks, so he hadn't found a reason to. Perhaps he should have, otherwise, he wouldn't have been in this situation where he had been attacked in his private quarters—while Runed against intruders, the royal family had less trouble breaking through them than the rest of the Underworld—and dragged out in this fight before for their father.

A father…who honestly couldn't care how this fight ended up.

Caiaphas, a muscled red-skinned demon with three hideous yellow eyes, snorted before dragging Tom up by his hair and displaying him before their father. The jeers around them grew and Tom fervently wished that he could move, could do anything, but knew that his so-called 'Brother' had slipped some sort of poison into his system long before. Its first stage was paralysis, but, in a slow and agonizing, fashion, it would eventually end him in the most painful way possible—by consuming his internals first before he could finally perish.

Caiaphas was many things—a slimy backstabbing cowardly monster in the literal sense who cared nothing for others or the citizens of the Underworld while secretly coveting the throne—but he was an expert in various toxins and poisons. He obviously had put quite a bit of oomph into this one because, even with his superior DNA, Tom could feel himself falling more and more into the Second Stage of this poison—uncontrollable delirium that led to insanity. While it eased upon on the paralysis during this stage, it was even worse because he would literally be unable to control his body as it rampaged due to the pain eating him from the inside out.

"Father!" Shouted Caiaphas proudly, displaying Tom's battered body for all to see. "I have bested your favorite son and have earned the right to the throne!"

"I have no favorite son," Spoke Abbadon emotionally. "Whoever is strong enough to keep their place as my Heir until my murder," Note, he said murder. In the history of the Lucitor Family, there really hadn't been a 'peaceful transition of power'. Tom had hoped he could avoid that messy business…but perhaps he should have done what his uncle did and eliminated all of his siblings as they were born; it was just bad luck that his uncle had contacted a disease before killing Tom's father, leaving him as the only heir. "Shall keep it and decide the fate of the Underworld."

"Then that is me!" Roared Caiaphas triumphantly, throwing Tom's body down at Abbadon's apathetic feet. "I will not take your life, yet, Father," Spoke Caiaphas, as if it was a done deal. While Abbadon had inherited the throne on a technicality and was rather apathetic to the duties of it, he was certainly no push-over. If he had been, the Revolutionaries, a group of citizens who wished for fairness and rights, would have been able to kill him long ago. "But, as you can see, I have defeated your Heir! Declare me now and I shall lead our armies to victory!"

Tom's fist tightened at the reminder of Caiaphas' particular reasoning for this usurping. It wasn't just because he wanted to be the Lord of the Underworld, but because of the War between Monsters—aka, the Immortal and his forces—with the other dimensions—Mewni and those part of that collective alliance—was, for lack of a better word, really heating up.

So far, under Tom's command, because Abbadon could really care less about some things, the Underworld had been neutral in the entire thing. While he desperately wanted to protect Star's Kingdom—Star…where was she…it had been so many years—he knew that the Immortal was not one to be underestimated and, should they choose sides, would likely end up badly for the Underworld and its residents. He wasn't the greatest mock-ruler, but he honestly cared about the people. He once cared for nothing but his own feelings and desires—when Star had dumped him, prompting him to try and change everything in his life for her—Star's disappearance had shaken him to his core. He began to question his priorities and who he wanted to be in life.

With the Mewni-Monster War escalating and bringing all the other dimensions into it—whether they were directly involved in the fighting or neutral like him, they were still greatly affected—he had been forced to step up and quell the near civil wars in his kingdom over what side they should support. While very few were up for protecting Mewni—after all, none had forgotten about how the Mewmans had gained their power in the first place—they weren't savages who wanted to harm innocents born generations after the Great Monster Massacre. That was the majority of the civilian and merchant classes, the middle and lower (who, in the past few years, he had gotten much closer to and sympathetic towards their plight, even if there was little he could do quelling possible civil wars and maintaining 'peace'). Meanwhile, a great deal of the nobles wished to join the Immortal and shed as much blood as possible. He had been very busy these past few years preventing bloodshed among his own people that he wasn't even able to search much for where Star had gone to. He just knew, even now, that he didn't want to do anything to harm her.

So, for his people, he would keep the Underworld out of the Mewni-Monster War.

For Star, he would keep the Underworld from joining the Immortal's side in the Mewni-Monster.

But…now…that was all about to change.

He had to get up, had to stop this buzzing in his head, but, despite his efforts, he was only able to dig his fingernails into the ash and brimstone. His vision was getting more and more blurry, his breathing becoming erratic against his will, and making even doing that a near impossibility.

"Awww," Mocked Caiaphas, laughing at Tom's plight. "Does the widdle prince need some help?"

Out of nowhere, Caiaphas brought his foot into Tom's side.

Tom nearly choked, hearing more than feeling bones SHATTER in his side. He heaved, trying to prevent the bile from rising up in his throat and spilling out. He had lost much this day, but he wouldn't let Caiaphas take the shreds of dignity that remained.

Though, in a few minutes, he wouldn't be able to control losing that either…losing your mind generally made control difficult…

The vision in his three eyes—or, more like one and a half, since the top was swollen shut and his right eye rubbed raw with brimstone ash as his face was rammed into the ground—swam and he coughed violently. He felt himself being lifted up once more and he did his best to glower down at that worthless excuse for a demon—not that it probably did much.

"Poor, poor, Tomias," Sneered Caiaphas. "Not so strong now? I must admit, Brother, that you've remained on your high horse these past eighteen years—but no longer! You've always been a freak and disgrace to the Lucitor name! Once, perhaps, you had been nearly worthy of the name…your Magic the least pitiful thing about you...but you lost what respect you once held when you met that Mewman—Star Butterfly, wasn't it?"

At the name of his ex-girlfriend, Tom couldn't help the snarl that was released from his throat.

Caiaphas laughed jeeringly. "How pathetic!? Still obsessed with that dead princess, aren't you? Oh? You thought I didn't know about that? About how no one has seen the so-called Mewni Princess for three years? I suppose it's possible they hid her away, like the pathetic cowards the Mewman are, but, where could she have possibly gone!? You may have been trying to keep the Underworld out of this War, Brother, but no other dimension can say the same! The Immortal's rage will consume this Universe! And it's about time the Underworld takes the winning side!"

"You'll...never…win…" Choked out Tom, Caiaphas' claws gripping his throat even tighter at the response. "You'll…always…be a worthless…excuse—"

Before Tom could finish, he was being slammed to the ground. But, his point had obviously gotten through because Caiaphas was more enraged than ever. Even if this turned out to be the last thing he saw, he was more than pleased with wounding the other's ego.

"You're the worthless one," Snarled Caiaphas. "You know, I wanted to see you writhe, go insane before screaming your agony at your death, but... I think I'll end it here."

One of his zealots tossed over a jagged obsidian dagger—one that Tom knew could more than end his life if stabbed correctly. Caiaphas caught it without even looking before glancing over to the Throne of the Underworld once more. "On your command, Father?"

Abbadon, as apathetic as always, didn't bother lifting a finger. "Do what you wish, I have no part in this."

Caiaphas grinned maliciously before bringing the dagger above his head. "Goodbye, Brother," Whispered the red-skinned demon, obviously pleased that this was the way it was going to end. "I hope you rot in eternal agony."

He swung—

It was then, colorful filling his vision as the Second Stage of the poison kicked in, that he suddenly felt a lurching sensation at the bottom of his gut. He didn't know what it was but only knew that his body was being painfully whipped around in every direction. And, as much as he tried to remain strong, he couldn't help feel…afraid.

Yet, as the insanity consumed his mind, and he felt himself fade into a painfully searing light—he thought, just for a moment, that he could feel something calling out for him…

Something…not terrible…

Everything went dark.

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End Chapter 1

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Author's Notes: Well! What do you guys think? I honestly expected to get further than this in the first chapter, but Janna wanted screen time and Tom's half-brother Caiaphas didn't know how to shut up so…yeah… Marco's trapped at school with crazy classmates and blood rituals and Tom's on the unfavorable end of a royal usurpation. Fun times.

Also, Kudos to whoever can accurately tell me the origin of Tom's 'Name' (Tomias) and Caiaphas!

Review please!