Disclaimer: I don't own Jace or Persassy and this will probably be the bane of my existence.

"So, what do we do now?" Simon said as he looked at Izzy. The gang listened intently to what Percy had said. Greek gods… Roman gods and lots of quests.

Percy smiled, "I have no idea why you guys are here… maybe we should go to Olympus and ask the gods if they summoned you?"

Simon thought that wasn't such a bad idea. Before he could say anything, the door of the church opened and a girl with curly blond hair stood stoically. "Perseus Jackson! How could you leave me! Going with a bunch of random strangers? Are you mad? No offense to you guys it's just that we don't know who you are and-," she let out a frustrated groan. Simon could now see that she was truly panicking without Percy. Percy looked at her calmly almost as if he'd been in this situation many times before. Simon could easily imagine that. Percy looked like a trouble maker.

"Annabeth, babe. Come on! I sent you a message and," he sighed. "I'm sorry."

"Okay… Just don't do that again."

Percy smiled. "Never again."

Annabeth eyes filled with tears and looked down. "It's what he said right before we fell into Tartarus."

The 6 people behind Annabeth looked solemn. To be honest Simon had not noticed them until now and that was bad. As a Shadowhunter in training, he should have noticed them and classified them as threats. Simon thought about what she said. Tartarus? Wasn't that like hell or a demon realm?

"Percy!" said the blond wearing a superman t-shirt, standing beside Annabeth. "Bro… We didn't even leave you alone for an hour and you make new friends?"

Percy smiled and said, "Bro, I'm like a puppy – always happy and making new friends."

Izzy smiled. "We literally met him 15 minutes ago. He was petting a hellhound, which if I can say is pretty damn weird."

Percy and Annabeth burst out laughing. Simon looked at them weirdly and noticed he wasn't the only one. Everyone just stared at them and shook their head like they knew they wouldn't get the joke.

"Okay, why don't we introduce ourselves?" Jace said finally. It was amazing that he was quiet for so long but Simon had noticed him talking to Clary. He really loved Clary and she was always his first priority, even if the world was burning. It was the same for her. As long as she had him, it didn't matter what she owed heaven or hell. Simon shook his head. That was...familiar. Eerily familiar and creepy.

"Jason Grace, Son of Zeus… I guess. I'm his roman's form child." Jason shrugged.

"Piper Mclean, Daughter of Aphrodite." The girl smiled. She had a nice voice.

"Frank Zhang, Legacy of Poseidon, son of Ares or Mars." He smiled very timidly.

"Hazel Levesque, Daughter of Pluto or Hades?" the girl smiled warmly. She was adorable.

"Will Solace, Son of Apollo." He looked at the boy next to him. "The grumpy one is my boyfriend Nico di Angelo, Son of hades."

The girl that yelled at Percy said. "Annabeth Chase, daughter of Athena. " She looked at her boyfriend. "And that puppy, I'm sure you know him, Perseus Jackson, Son of Poseidon."

Perseus sighed. "Call me Percy."

"I'm Simon lewis. A Shadowhunter."

"Isabelle lightwood. Same as him."

"Jonathon Christopher Herondale. Call me Jace. Also Shadowhunter. The tired person on my lap is Clarissa Morgenstern." His girlfriend hid her face and punched Jace in the stomach. "Call her Clary."

"Just don't call her biscuit that's my thing. I'm Magnus bane-"

"You have the same name as my cousin, Magnus Chase." Annabeth stated

Magnus pouted. "You ruined my dramaticness. I'm Magnus Bane, High warlock of Brooklyn. Uhm. I'm forgetting something. Oh yes!" glitter exploded and Magnus smiled happily. "That's my boy toy Alexander -Alec- lightwood, he's a sexy Shadowhunter." Alec blushed at that remark.

"Magnus! Do you have to be so-"Alec stopped and stared at something behind Magnus. Everyone looked and saw what he stared at.

A crash sounded and bright light suddenly appeared. Simon looked and couldn't believe his eyes. The air rippled and deposited something. A greenish-grey blob with a glowing black core (A/N I'm literally sitting here with my Shadowhunter codex… mwahahah). Simon took a closer look and it clicked.

A du'sien

Percy was used to weird things happening but this… was probably in the top 5. The greenish-grey blob started to move and form actual limbs. Perhaps its journey here was a rough and tumble so it didn't have a form? Percy didn't particularly care but it was a little too close to Clary and she looked a little dazed. He reached to get riptide but then stopped. This thing- whatever it was- wasn't from his dimension so could celestial bronze destroy it? Percy didn't know and wasn't going to find out because in one strike it was gone and Jace was smirking lazily, tossing a blade and catching it.

"That was easy," Jace said and looked at Clary who turned and beamed at her boyfriend.

"It was a du'sien demon. You know the lesser known to the eidolon demon, but Jace is right. That thing didn't even get to form before it was killed. If it was a facemelter then things would-" Simon was abruptly interrupted by Jason.

"Wait. You have a demon named facemelter?"

Jason's girlfriend, Piper, elbowed him. "We just saw a demon and the weirdest thing for you is the name?"

"Didn't you here what Simon said! He said it's a du'sien demon not a facemelter which would be more dangerous," Izzy said getting a little angry.

Jason being the peace keeper held up his arms in a T. Just before he could say anything, the Shadowhunters and demigods were…gone.

So short... Jammer but I had to end it there..the rest is just like totally for another chapter!

Will update real soon!

-Katy