~Seven Trumpets of Hell~

Full Summary: 20 years after the Dark War, the Nephilim are living in their own kind of peace without troubles from both Shadowhunters traitors and faeries. They've lived two decades without worries of war or losing any more of their own. But the life of a Nephilim is ever peaceful. Soon enough, they're betrayed by another one of their own, who's allies with an unknown enemy, only this one plans to get rid of every single one of them, along with the mundanes.

The son of Clary and Jace Herondale, Jason, suddenly gets involved when he meets the new girl at the Institute, Caitlyn, who happens to know more than anyone about this mystery war. The Herondales and Lightwoods, along with Magnus Bane, are suspicious about this girl until she proved herself guilty by strolling around the underground tunnels of the Institute. They soon find out that she's threaten to help someone who wants to free the legendary weapon of Abbadon, Angel of Death, who once plan to used them against the Nephilim: The Seven Trumpets of Hell.

Author's Note: I know what you must be thinking... "Ugh, the same 'After the war' fanfics" but I just wanna let you know this isn't some stupid fanfic with horrible grammar. I actually made an effort on this fanfic and I really hope you guys give it a try, please. I will be more than grateful.

Thanks and I hope you enjoy~ ^^


Chapter 1

The Portal

"Jason!" Someone knocked, not so gently, on his door "Mom says it's time to go!" Knocking gets louder.

"I'm coming! By the Angel..." She, Rose Herondale, giggled leaving Jason Herondale alone -for now. He sighed grabbing the jacket from his chair and walking out of his room, but not before checking himself in the mirror one last time. He followed his sister's footsteps that echoed through the empty corridors of the Institute. He have always been fond of the silence that came with the Institute, as well as the familiar scent of dust and candlewax. It might not smell like a fresh summer breeze but it was still home. He round a corner hearing his sister's footsteps slow down and reached the stairs where his parents were at, along with Max and Annabelle Lightwoods, Isabelle's and Simon's twins.

"Well about time!" His mother, Clary Herondale, exclaimed "I thought I had to go there and drag you out myself" She huffed clearly annoyed by her son's tardiness. Rose giggled standing close to her mother, who looked like the mini version of Clary only her eyes were a mixed of green and gold and her red hair was shorter.

"I can always go in my pajamas." He suggested smugly "It's not like I can't make them work" He smirked. Clary glared at him, "You're not going to the Victorium in your pajamas. Ever". Jason mumbled a yes ma'am making Clary smile in triumph. The Victorium was a celebration ball to celebrate the 20 years of peace for the Nephilim, 20 years without war. His parents, uncles and aunt are a big deal and if they don't attend apparently there won't be any ball. He was wearing himself some dark grey jeans and a black T-shirt with his black leather jacket. His mother was wearing a long-sleeved forest green dress, which made her eyes look bright green, Rose a simple black dress appropiate for a 13-years-old who wanted a strapless party dress, giving her father almost a heart attack. Jason turned to his father, Jace Herondale, who was eyeing his jacket.

"Is that my jacket?" He accused narrowing his eyes at him. Jason gulped, rubbing the back of his neck sheepishly. "Maybe?" He chuckled nervously looking at his father, who's golden eyes were a bit darker than before. That's the thing that distinguishes Jace and Jason, their eyes, besides that nothing. Same golden hair, same frame, same posture, same personality, same attitude, same skills, everything except for their eyes. While Jace's are gold, Jason's are green like his mother, the only thing besides drawing that he got from Clary. He was wearing black jeans and a white button down shirt with a black vest over it.

Jace pointed an accusing finger at him with a very serious expression. "If I see one scratch but I mean one scratch on my precious sexy black leather jacket..." He paused for a moment for dramatic effect as always "I will personally take your hunting boots and replace them with the ones in the stock" Jason's eyes went wide with horror.

"What?!" He screeched "Dad those are horrible for fighting! It wouldn't be fair!" Jace shrugged, unfazed.

"Everything is fair when it comes to love and war" He quoted like it was him who came up with it. Clary rolled her eyes, "You mean everything's fair when it comes to your precious fighting gear". Jace smiled and kissed her cheek, "Indeed".

"Ugh, first Mom and Dad, now you" Max gagged along with his sister. "Seriously people," Annabelle all but shouted, "There's a reason why rooms where created!" Jason and Rose couldn't have agreed more with Annabelle. Jace and Clary laughed loudly, both because of the resemblance between the twins and their mother, and also 'cause they enjoyed seeing the kids all flustered.

"Annabelle, darling, please shout louder so I can hear you if you don't mind" Isabelle Lightwood, who was heading toward them with her husband Simon Lewis, said in a sarcastic but harsh tone. Annabelle pretended not to have heard a thing and exclaimed, "You're alive!".

Unlike Jace and Jason, Isabelle and Annabelle only had the same eyes, same frame, same interests and definitely the same attitude. Max has his mother attitude but he's more like his father in frame and personality. Max has his mother's black hair and his father's coffee brown eyes as well as Annabelle. The oldest twin is Max by only ten minutes which causes a lot of fights between the two.

Annabelle, like her mother, was wearing a silver party dress while her mother's was a golden one. They were both wearing black high-heels boots, which apparently is a mother and daughter fashion. Max was wearing grey jeans and a T-shirt with a royal blue leather jacket, his father, on the other hand, was wearing dark jeans and a white T-shirt with a beige leather jacket.

Isabelle rolled her eyes at her daughter and waved it off, "We were delayed with some stuff" Simon nodded but the gleam in his eyes gave it away.

Max coughed into his fist, "Yeah...stuff" He muttered in a low tone though everyone heard him. Jace scowled, "Please stop reminding me that my oh so lovely adoptive sister is having sex with my ex-vampire ex-mundane brother-in-law who's not even related to my wife." Simon gladly returned the scowl, "And I'll be more than grateful if you stop reminding me that my oh so gentle best friend turned parabatai is having sex with my narcissus arrogant ex-nemesis brother-in-law who's not even related to my wife but someone manages to get on my good side". Jace and Simon stared at each other for awhile before breaking into wide grins. "Touché, my friend, touché", Jace grinned while giving Simon a manly hug. Isabelle and Clary were both smiling, content that after all these years they have build a strong bond, surprising quite a few of them but they were glad all the same. The kids, though, were trying not to puke on the spot.

"What a oh so lovely family reunion", Jason said sarcastically in his mocking polite manner, "Now can we please go?" He gestured dramatically to the elevator where all three children were standing at looking impatiently at their parents. "Alright, Alright" Isabelle said smiling, "You guys go ahead will be right behind you". Simon unlatched the gate and slid it open for them, "Finally" Annabelle sighed getting inside the elevator followed by Max, Rose, and Jason.

Once inside, Simon latched the gate shut but not before Jason told them, "Don't go having second thoughts about going to the party" He winked and pressed the button before he got scolded by his mother. Max guffawed while Annabelle and Rose looked at Jason disgusted.

"Ugh, you're so gross" Annabelle frowned disgusted. Jason shrugged and grinned, "But you still love me anyway". She rolled her eyes crossing her arms, a ghost of a smile on her face, waiting for the elevator to stop. Jason smiled leaning against the black metal walls of the elevator. Once it stopped they all stepped outside into the nave of the Institute. Rose all but skipped to the wide double doors, passing the pews on her way. Jason couldn't help but chuckled at his sister's childishness and was going to turn to Annabelle and Max, who were bickering as always, when he heard Rose calling him.

"Jason! Help me with the bolts" She crossed her arms stomping her foot, annoyance clear on her face because she couldn't reach the bolts. He chuckled hurrying to his sister's side and said, "Watch and learn". He reached the highest bolt, dragging it back, and moving down to unlock the others. Once finished, he turned to his sister smiling charmingly, knowing it will annoy the hell out of her. Rose glared at him and turned to push the double doors open but not before punching him in the gut. He laughed helping her open the doors right when Annabelle and Max joined them.

"Glad you could join us" Jason commented glaring at them, though it didn't quite reached his eyes. Max scoffed, "Not my fault. She was complaining, yet again, because I accidentally stepped on her new high-heels boot". Annabelle glared daggers at him, "That's because you did! You know it's practically against the law to step on my boots!". Max almost growled, "It's not the law when you come up with it!" Annabelle gasped and they were bickering all over again.

"Shut up!" Jason shouted, shutting the two of them, "From now on I'm the law! So shut up and listen to me, you're most precious ruler." Annabelle and Max exchange pissed looks, turning to Jason and they chorused, "Fuck yourself".

Jason smirked, "Oh I would if I could". Annabelle groaned walking pass Jason and the double doors. "Come on, Rose, let's get as far away from your sick pornographic brother." Rose laughed and followed Annabelle outside. Max clapped Jason on the shoulder and sighed, "And you wonder why they always run away..." Jason's features darken but it was gone just as quick as it came.

"Trust me, I know why.." Max sighed sadly, he knew very well the reason why. Jason ignored Max's pity and headed outside trailing behind the girls with Max on his heels. At the bottom of the steps of the Institute, standing beside the girls, was Alec Lightwood with his adoptive son, Nathan.

About 16 years ago, Alec and Magnus found Nathan, 2-years-old, crying in an alley here in New York, but he wasn't quite alone. They found him slumped over the body of his dead father, who was murdered in the spot. They were going to call the mundane police when Magnus recognized the man as a warlock named Tristan Blaze. Therefore, they contacted the Clave of the unexpected murder and soon they were surrounded by Shadowhunters. At this the Council hold a small meeting, only those eighteen and over, regarding this unexpected murder, pondering whenever they should have more reinforcements for the safety of both Shadowhunters and Downworlders. The Consul and Inquisitor agreed that if such thing happened again they will take charge and find whoever wants to harm the Downworlders as well as Shadowhunters. After the Clave agreed to this terms they grew quite curious as to how the warlock has a child, which Magnus replied that Tristan's mother was a Shadowhunter, who wanted nothing with the Nephilim, and his father an Eidolon demon, just like Theresa Gray was born.

The Clave, knowing such thing is possible, change the subject and they consulted on whenever taking the child to the New York Institute, since Magnus stated the child had the blood of the Nephilim on his veins, or give him up for adoption, considering he was still a baby and apparently had no mother or relatives whatsoever. Not many volunteered since he was the child of a Downworlder, even if he was a Nephilim, and those turned out to be a mess. Magnus, surprising everyone, even Alec, offered to adopt the child since he was good friends with Tristan and he felt like he owned him a favor by taking care of his son. The Council, considering the child was a warlock's son, didn't hesitated and granted Magnus permission to adopt the child on one condition, he will be educated and trained as a Nephilim, which he whole heartedly agreed. At first Nathan was scared of his new family but the Lightwoods and Herondales took him in and did everything they could to make him feel at home. After a few weeks he was all comfortable with his new family, much to Magnus' and Alec's happiness.

Now, he was a full grown 18-years-old young man with messy black hair, sky blue eyes and paled skin making him look like Alec, especially since they were almost dressed the same except that Nathan was wearing a grey leather jacket with a black T-shirt and dark blue jeans while Alec was wearing a blue vest over his black button down shirt with very dark blue jeans that almost looked black. Jason hugged his uncle Alec before grinning widely at his best friend, his parabatai, which Nathan gladly returned. "Hey, dude" Jason clapped Nathan's hand and pulled him for a manly hug. "Sup, Jay" Jason glared at him, he hated when people called him Jay, but smiled anyways.

"Are you ready to face the faeries?" Nathan grinned mischievously making Jason scowl. "Dude, don't remind me", Nathan laughed shaking his head, "Seriously, Jay. You already hooked up with what? Five, ten faeries already? Do you even know how dangerous it is to date a faerie?". Jason sighed annoyed, "Of course I know...but hey, they know how to make out, and not the sweet kind". Nathan rolled his eyes at him, "Whatever you say, dude". Jason shrugged as the double doors opened revealing his parents as well as Max's and Annabelle's.

"Took you long enough" Max scoffed, who was with his uncle Alec and sister. Jace shrugged walking to his parabatai to greet him. Clary and Isabelle hugged Nathan, they absolutely adored him and treated him like their own son, when someone came from the side of the Institute.

"Next time you make me wait all alone," Magnus Bane started, strolling toward them in his usual attire, jeans and a sparkling dark purple vest over his white button down shirt and his sparkling make up, "in the cold, for an hour, I will hex you all into walking disco ball, all shiny and sparkling. Am I clear?" He raised an eyebrow at all of them, trying to look all serious but they could see the ghost of a smile. Alec chuckled and kissed his husband on the cheek, "Crystal", Magnus narrowed his eyes at him though he was smiling.

Clary smiled apologetically, "Sorry, Magnus. We were a bit delay." Magnus dismissed her apology, "No need for apologies, Clary... Now, the portal is ready when you are" He gestured to the side of the Institute. Rose squealed grabbing her mother's hand and dragging her toward the portal, and Clary laughed at her daughter's fascination of portals. Jace looked at the scene with a smile before following them with the rest. Rounding the corner they saw Clary and Rose standing infront of the portal, the surface glimmering like water, with Magnus right beside them.

"Alright," He clapped his hands, "I will say elderly first but that will be an insult to me so ladies first." Rose giggled and holding her mother's hand tightly, jumped into the portal with her. After them went both Isabelle and Annabelle, then Simon and Max, then Jace and Jason, and lastly Nathan who went with Alec. After everyone was already through the portal, Magnus' yellow-green cat-like eyes lost their glow.

"Something's coming, my Alec... The demons are shaking with excitement..." And with those last words he jumped into the portal.


Thanks for reading and please leave a review~

~Nephilim_Fairchild21