Malace || PJatO || Nicercy || Shadowhunters: The Heroes of Camp Idris || Nicercy || PJatO || Malace

Title: Shadowhunters: The Heroes of Camp Idris – When the Europeans Come to Visit

Fandoms: Percy Jackson and the Olympians / Heroes of Olympus; Shadowhunters: The Mortal Instruments

Disclaimer: All rights concerning Percy Jackson are reserved to Rick Riordan for he created the awesomeness that is Nico di Angelo. And everything else related to Percy Jackson and the Olympians / Heroes of Olympus. Aside from the Gods, they belong to the old Greeks. All rights to the Shadowhunters PJatO reserved to Ed Decter, the books the PJatO is based off and its characters belong to Cassandra Clare. This fanfiction and its OCs on the other hand are entirely mine. No money is made with this, though reviews are more than welcomed.

Warnings: shounen-ai, polyamory (threesome), explicit intercourse, anal, oral, fluff, hurt/comfort, (many) idiots in love, shoujo-ai, hetero

Main Pairing: Nico/Percy & Magnus/Alec/Jace

Side Pairings: Lydia/Isabelle, Simon/Clary, Bat/Maia, Frank/Hazel/Leo, Jake/Will, Piper/Annabeth, Jason/Reyna, Chris/Clarisse, Malcolm/Katie, Grover/Juniper

Shadowhunters Characters: Jonathan Christopher 'Jace' Wayland, Magnus Bane, Alexander Gideon 'Alec' Lightwood, Isabelle Sophia 'Izzy' Lightwood, Clarissa Adele 'Clary' Fray, Simon Lewis, Lydia Branwell, Madzie, Maia Roberts, Bartholomew 'Bat' Velasquez, Luke Garroway, Jocelyn Fray

Percy Jackson Characters: Perseus Jackson, Nico di Angelo, Hazel Levesque, Frank Zhang, Leo Valdez, Jason Grace, Reyna Avila Ramírez-Arellano, Annabeth Chase, Piper McLean, Rachel Elizabeth Dare, Lou Ellen, Cecil Rogers, Will Solace, Jake Mason, Clarisse la Rue, Chris Rodriguez, Malcolm Cage, Katie Gardner, Grover Underwood, Juniper

Summary: Nico di Angelo has a new best friend – Magnus Bane, son of Hecate. Magnus' arrival at camp had been about the most exciting thing to happen since the end of the Giant War.

At least until the Shadowhunters arrive. Jace Wayland, son of Apollo, Isabelle Lightwood, daughter of Aphrodite, and Alexander Lightwood, son of Athena. Demigods from Idris – the European version of New Rome, where demigods call themselves Shadowhunters. They came with a mission, to track down someone who had played a key role in setting up the Giant War many years before it had actually happened. Valentine Morgenstern. The three European demigods ask and receive the help of Camp Half-Blood and Camp Jupiter.

And Nico finally gets some revenge on Magnus for always teasing Nico about his feelings for Percy Jackson, because oh, Magnus also seems to know how to pick them...

Shadowhunters: The Heroes of Camp Idris

When the Europeans Come to Visit

Chapter 2: Piper and Isabelle

"This is it. I give up. I surrender. This one is worse than Nico and Percy combined! I do not believe that he's any brother of mine with how little regard he has for anything health or safety!"

Isabelle snorted amused as she watched the blonde son of Apollo throw his hands up in the air and storm out of the infirmary. Tilting his head like a very confused puppy, Jace pressed down on the wound on his side some more. Well, as good as he could, anyway. It reached along his side and toward his back, a place he of course couldn't reach that well. The towel was taken from him and pressed against the wound silently. Twisting a little, Jace faced a scowling Alec.

"You should have told me that we ran out of nectar and ambrosia", whispered Alec displeased.

"No", huffed Jace. "You were hurt. Worse than me. And you wouldn't have eaten it if I had told you. You needed it more than I did and I'm fine."

"Normally, fine people don't lead to our head of the infirmary to run out cussing."

In came a gorgeous native American girl with a judgmental look on her face. She was closely followed by some of the other demigods who had welcomed them to Camp Half-Blood.

"You people owe us a couple of answers", stated the pretty, curvy blonde from earlier.

"Jace needs help", growled Alec defiantly, glaring the blonde girl down.

"Nico. Sweet-talk Will into coming here and taking care of the blonde", sighed the girl.

One of the three boys cussed in Italian beneath his breath before leaving, while another one – with very fascinating sea-green eyes – glared after him jealously. Isabelle knew that look too well; as a daughter of Aphrodite, she could see such things far clearer than others. Isabelle watched with curious eyes how the grumpy Italian returned with the highly displeased blonde son of Apollo.

"Okay. Will is going to take care of... Jace. You other two come with us", requested the blonde girl.

Alec turned to look pleadingly at Isabelle. The siblings knew each other well enough for Isabelle to read that look with ease. Don't make me leave Jace wounded and alone with strangers, Iz. It didn't take Isabelle being a daughter of Aphrodite to read the love Alec held for Jace, had held for Jace for many years now. She smiled warmly. She knew he wouldn't request for her to go there alone if he didn't believe her to be capable of holding her own and get out of trouble, if this led to trouble. And after all, they had been sent here with the assurance that Camp Half-Blood would be allies.

"I'll come with you", offered Isabelle with a smile aimed at the strangers. "My brother will stay with Jace. Maybe he can make Jace more... cooperative."

"That would be highly appreciated. Otherwise, I will tie the guy to the bed", grunted Will.

"Ask a guy out for dinner first before putting bondage on the table", quipped Jace.

Isabelle smiled to herself at the green fire-like flare of jealousy in Alec's aura. Her brother was so gone on Jace, it wasn't even funny anymore. Turning her attention toward the campers, she followed them toward the large house where the small group sat down in a kind of meeting hall.

"I'm Annabeth Chase, daughter of Athena and leader of Camp Half-Blood", stated the blonde girl.

"Co-leader. Otherwise certain queens would not have abducted me", huffed the boy next to her.

Annabeth rolled her eyes at that. "Co-leader. That's my co-leader Percy Jackson, the son of Poseidon. And those are Piper McLean, daughter of Aphrodite, Nico di Angelo, son of Hades, Magnus Bane, son of Hecate, and Clarisse la Rue, daughter of Ares. Now. Who are you? Where do you come from? What do you want? What is Camp Idris?"

Despite herself, Isabelle had to grin. Such a daughter of Athena, really. The sharp eyes and mind, the focus on what was important. She already reminded her a lot of Alec. Looked like him too.

"I'm Isabelle Lightwood, daughter of Aphrodite. My companions are Jace Herondale, son of Apollo, and my brother Alec, son of Athena", started Isabelle, seeing the way Annabeth opened her mouth. "Same mortal father, different godly mothers. And we're all three Greek demigods, like you guys."

"Then where do you come from?", asked Clarisse, definitely more accusatory than Annabeth.

"Camp Idris", offered Isabelle with a charming smile. "It's... essentially the same as your camp here, just that it's located in Europe. Protected by magical borders set by Lady Hecate, it lays somewhere between Germany, France and Switzerland."

"A... European camp?", echoed Nico skeptically. "I don't buy it."

"It's been around for a long time", chuckled Isabelle. "But... well, the gods don't really want for us to mingle. Where you guys are guarded and trained by Chiron, we are guarded and trained by his wife Chariclo. We... didn't know about you guys until the Giant War. Or did you think that seven of you guys coming to Europe was all it took? Or that the Titan War only took place in the US? Very... self-absorbed. Europe is the old land where it all started. Of course there are a ton of monsters there too. Or course did Titans wage war there too. Not to mention... Why would mortal parents to demigods have to somehow ship their kids over the ocean to the US? And that... the few of you are all Greek demigods there are? We were busy defending our home and fighting on all other fronts during the Giant War, which was why we left the big guys to you, because we knew you had children of the Big Three – a caliber of demigod we don't have currently."

"It... makes sense", offered Annabeth critically, frowning. "We didn't know about the Romans who lived literally on the other side of our own country."

"True", grunted Nico displeased, leaning forward just a little, subtly shielding Percy from her.

It was a bit endearing, in the same manner as Alec tended to try and protect Jace too even though Jace was basically the best fighter Camp Idris had. Love made people do irrational things.

"So. What brings you here now?", asked Piper curiously.

Isabelle turned a little more serious. "The Titan War. We... know what happened on your end. Honestly, some of you" - and here Isabelle turned to look at Percy - "are legends over where I'm from. I'm assuming considering you didn't know we exist, that you also don't know how the Titan War went in Europe." At the blank stares from everyone, Isabelle nodded. "Count your Titans."

Annabeth frowned blankly at her for a moment before realization dawned on her. "Kronos led the Battle of Manhatten. Hyperion was with him. Oceanus kept Lord Poseidon busy in the ocean. Krios kept the Romans busy on Mount Othrys – something we had not known prior to the Giant War either. Iapetus was... stuck in the underworld after trying to fight Hades. That... That has always left Koios unaccounted for. We... never really thought much about that though."

"Well. Koios was busy in Europe, with his own legions of the Titan Army", replied Isabelle patiently. "And that army was led by a demigod. Valentine Morgenstern, son of Eosphorus. He... betrayed Camp Idris, had pledged himself to the Titans because they had promised him the end of all monsters forever. He just... wanted to cleanse the world. Things were... quiet about him after the Titan War. But... recently, we've been informed that he's in the US. Trying to gather a new army to overthrow the gods and seize control himself, as he had probably already planned the first time around. He's a war criminal of our jurisdiction, but we suspect he's now causing problems in your jurisdiction so Chariclo suggested to unite forces with you guys to track him down."

"Valentine", hissed Nico with realization dripping from his voice as he jerkily elbowed Magnus.

Annabeth's eyes, if possible, sharpened even more and after exchanging a long glance with Percy, communicating without words similarly to how Alec and Izzy did, she then turned toward Isabelle with a polite smile. Isabelle understood what was going on and got up.

"I think I'll go and check on Jace while you... discuss among yourselves", suggested Isabelle.

Annabeth looked slightly grateful that she offered, so Isabelle made her way back to the infirmary. Will looked even more frustrated than he had when previously storming out of his own infirmary. But the fact that Jace was properly bandaged up and that Will hadn't fled seemed like good signs.

"How is our patient?", asked Isabelle playfully as she sat down on the empty side of Jace's bed.

"Stubborn as a bull", grunted Will displeased. "But he'll be fine. If he had done more than crudely hide his wound so it had the chance to get infected, that would have been great. Now, if you'll excuse me, I am running late for a date. Make yourself at home."

With that, Will left. Jace was laying on his uninjured side, head resting on Alec's thigh so Alec could play with the golden-blonde hair. Those two were ridiculously affectionate. The Achilles and

Patroclus of their time and day, as some at camp liked to joke. Isabelle smiled amused.

"I told them the facts. Let's see how they take it", whispered Isabelle softly. "You okay?"

"Mhmh", grunted Jace, rubbing his nose against Alec's thigh. "Sleepy."

"Then sleep some, angel", whispered Alec softly, tracing Jace's cheek.

Alec visibly relaxed now that Isabelle was back with them and Isabelle gladly leaned against her brother. They knew they could trust the demigods here, but it was still hard relying on strangers.

"Let's see how the verdict goes", muttered Alec roughly as Jace dozed off. "I can't believe he got hurt like that on the ship. Stupid idiot should have said something."

"Like you wouldn't have done the exact same thing", snorted Isabelle, elbowing her brother knowingly. "If you would have had the last nectar and both of you would have been injured, you'd have acted strong and tough and given it to Jace too."

Alec remained silent and glared at his sister for being all-knowing when it came to them.

/break\

"Love. Calm down and sit down", requested Piper in a gentle and slightly amused voice.

Annabeth had started pacing essentially the second Isabelle left the room. It was understandable. All those secrets. Always so many stupid, unnecessary secrets. She was mentally sorting everything out, filling in the blanks with the information Isabelle had just given to her. While her girlfriend was effectively working herself up, Piper decided to turn her attention to the others in the room. Clarisse was angrily sharpening a knife, which, never a good sign. Nico was talking lowly with Magnus, while Percy watched them, his aura a bright, jealous green. It was... not amusing. Honestly, it had stopped being amusing months ago. The mutual pining between Nico and Percy was ridiculous, but Piper didn't want to intervene. Partially because she didn't want to be that aspect of her mother – the matchmaker. And partially because, honestly, if the idiots couldn't even figure out how to get together without help, how in the world were they supposed to make a relationship work?

"What do you think, Percy?", asked Piper curiously, leaning in some.

Percy blinked and looked away from Magnus and Nico in favor of focusing on her. "I don't know. Guess what she says makes sense. With how the Giants took the war back to Europe, why would the Titans have ignored it. Where was that last brother. I'm just pissed we still haven't earned full transparency. Also, I am seriously tired of the gods' mess..."

"If the Valentine they seek and the Valentine who attacked my loft are one and the same, then... it's not just about the gods' mess", interjected Magnus, concern creasing his perfect features. "This man... slaughtered the warlocks under my protection. He will pay."

"And if he's trying to raise an army... Maybe for once, we'll get the chance to actually stop a war before it happens", added Nico nearly gently, resting a hand on Percy's thigh.

He knew Percy was tired, so tired of the wars. Heck, they all knew and they all were. But Percy was now finally getting a grip on his PTSD and had his life straightened out and part of Piper was worried what another war would do to Percy. He had suffered the most during the first two.

"It's getting late. How about we pick our guests up and show them their cabins?", suggested Piper.

"You could grill that son of Athena", grunted Clarisse, turning toward Annabeth. "See if this story of theirs really checks out. Tomorrow morning, I want to hear a decision from you, leader."

Annabeth heaved a sigh and ran her fingers through her hair, twisting it up into a bun and pinning it. "It's a good enough plan, I suppose... Yeah, let's call it a day for now."

Piper smiled pleased and headed out with the others. She curiously watched how Nico trailed after Percy toward Poseidon Cabin, probably to comfort him. Nico had always been ridiculously overprotective of Percy, but lately he has learned to show it in physical support. Piper smiled knowingly as she reached out to grasp Annabeth's hand and linked their fingers. Her girlfriend sighed and leaned heavily against her, clearly exhausted from the sheer force of knowledge.

"He—ey, guys", greeted Piper in a friendly manner as the couple entered the infirmary.

She blinked surprised at how Jace was cuddled up to the son of Athena – Alec, was it, right? The blonde was clearly asleep with his head resting in Alec's lap. The two of them radiated love so brightly, it was nearly blinding. As though their aura, their very soul, was one.

"Yes?", asked Isabelle attentively, looking up at them.

She was definitely impressive. Not only did she rock the tight white leather-dress, she also fought with her whip like an avenging fury. Beauty and brawn, definitely Piper's kind of sibling.

"It's getting late and we figured we'd bring you to your respective cabins. Here at camp, we're divided by godly parents. So if you'll follow me, Isabelle, and you'll follow Annabeth, Alec", explained Piper with a smile. "Jace should stay the night in the infirmary."

Alec tensed, ready to protest – he hadn't slept apart from Jace in over three years. Isabelle gave him a hard look, because this was not their camp and they should let their hosts call the shots. Alec deflated, though definitely not willingly. He got off the bed and leaned down to gently kiss Jace's forehead before facing Annabeth to let her lead the way. Isabelle all the while focused on Piper expectantly, observing how her American half-sister tugged on Annabeth's hand to pull her into a very brief but gentle kiss before they parted ways. Interesting.

"So your brother is so on edge because his boyfriend is hurt", mused Piper casually.

"Yeah. Well. Alec was that way about Jace even before they got together", chuckled Isabelle fondly. "Ever since we met Jace. Being overly protective because Jace... had been raised by a not good foster-father before he found his way to camp when he was ten."

Piper nodded sharply in understanding. "One of my best friends, he's been through the system too. It... doesn't always end well for our kind. Would you mind telling me more about your family? A man who manages to seduce two goddesses as different as Athena and Aphrodite... interesting."

Isabelle laughed and was glad for the change of topic, because she was not so inclined to sharing just yet that the foster-father who had raised Jace was Valentine Morgenstern. They doubted that this would go over well with their hosts. So if she had to talk about her family instead – she could.

"Well, our father is a son of Ares himself. Me and my brother were born and raised in Alicante – that is the city where demigods in Europe can safely live, within the borders of camp."

"Like New Rome next to Camp Jupiter?", asked Piper intrigued.

"Not familiar with how the Romans do it", admitted Isabelle with a smile. "But let's say yes. Anyway, our father met our stepmother Maryse in Alicante. She's a daughter of Enyo. They are a total power-couple, the Lightwood name holds a lot of weight in Alicante. Alec and I have another half-brother, who was born from that marriage. His name is Max and we adore him."

"That... sounds so colorful but also kind of amazing", admitted Piper and blinked. "The whole concept of having a safe city where demigods can have families..."

Isabelle hummed in agreement as she looked around. The Greeks around here apparently only had a summer-camp. Then again, America was still new – compared to Europe where the demigods had lived literally since the beginning of the Greek gods. Of course would the Europeans have more culture and background there. Still, Isabelle smiled as she was brought to the Aphrodite Cabin and shown a free bed to rest in. The journey had been long and tiring.

/break\

"You alright, Perce?", whispered Nico lowly as he slipped into the Poseidon Cabin.

Percy was sitting with his legs pulled up against his chest and his arms around them. There was a far-off look on his face and it wasn't hard to guess that he was thinking about the wars and what another major battle might mean. Camp had become just that – a summer camp of fun activities and being with the people he cherished. Nico hated Valentine for threatening to take that away again.

"I need a vacation, Nico", sighed Percy frustrated.

"After we kick Valentine's ass and Magnus finds a new place to live with his siblings, I'm going to take you on a beautiful vacation", promised Nico gently as he sat down next to Percy.

Percy blinked and leaned against Nico. "Promise? You'll take me on a vacation? Not stay with Magnus and help him settle in and whatever?"

Nico huffed slightly. "Mag is my friend, but he's fine on his own. And you could use a shadow-traveling guide through the world and I think we both deserve a break. That sound good?"

Percy hummed contently, head resting against Nico's shoulder in a way that made Nico's heart flutter. When he next checked on Percy, the son of Poseidon had actually fallen asleep. And he looked way too cute, nuzzled against Nico like that. His cheeks heated up. Cute Percy was going to be the death of Nico, that much was for sure. He leaned down to kiss the top of Percy's head.

/break\

Magnus smiled mischievously as he sneaked into the infirmary. He was curious about those new arrivals from Europe. What the gorgeous young woman had said earlier was more than intriguing, but Magnus knew the daughter of Aphrodite was with Piper in their cabin, while the pretty archer was in the Athena Cabin with Annabeth. There was one demigod currently unguarded and alone, because there were no others in the infirmary at the moment.

"Beautiful", whispered Magnus amazed as he entered the infirmary.

And truly, he was. Golden-blonde hair sprawled out around his angelic face like a halo. A stark contrast to the fierce, precise warrior Magnus had seen earlier at the entrance of camp. Now, the son of Apollo was deep asleep, peaceful and serene. Magnus blinked slowly as he took in the beauty. At least until he could feel the press of cold metal against his neck.

"Why are you watching my boyfriend sleep?", growled a dark, pleasant voice.

"I only just entered", chuckled Magnus, not showing how tense he was. "I didn't plan on watching the pretty thing sleep. I had plans of talking to him though."

The pretty archer growled at the comment about how pretty the blonde was. Oh dear, if Europe only produced such pretty, pretty demigods, then Magnus was most likely going to pack up and move to paradise. Slowly, Alec lowered the knife he had to Magnus' neck and instead sat down next to Jace.

"Why do you want to talk to him?", asked Alec, hand automatically finding Jace's hair to play with.

"Oh, it didn't have to be him. I just had some questions for one of you", stated Magnus. "You see, this Valentine you're hunting... He attacked me and my family."

"What did he do?", asked Alec tensely, fingers stilling in Jace's hair.

"I... ran a safe haven for young demigods, mostly children of Hecate like myself. We lived in safety and while I was gone, he came and attacked and slaughtered them. Children", whispered Magnus and averted his eyes, sadness shining in them before he looked up at Alec with fierce determination. "I need to catch this monster and I will make him pay."

Something in Alec changed at those words and he seemed to open up to Magnus a little. "Then, we have something in common. Because Valentine hurt someone I love very much too."

Subtly, Alec's grasp on Jace tightened as he pulled the blonde closer and it made Magnus raise both eyebrows, curious for the story behind this. For now, he fully believed that Alec was a hundred percent motivated to catch Valentine and bring him to justice. That would be enough.

Author's note: Sooo, this is not what was advertised. But hey. Happens. Ran away from me. *shrugs* Next chapter however will focus on Percy and Jace and them, you know, trying to form a plan of attack. Or something. You know Percy and Jace... the whole charge first, plan later thing? They share that.