Hi guys! I know I haven't really done many author's notes up to this point, but I'd really appreciate it if you could read this one, as I'm planning to give you some chapters early. Also everybody chill with the death threats please? I have a plan for Jem, I'm not just gonna randomly kill him off. I don't think you- and I'm talking to people freaking out on PM's and reviews, you know who you are- really understand how much I love Jem as a character. I wouldn't be able to kill him off without doing him justice or I'd need serious rehabilitation. Although I'd probably still need rehabilitation. Now this isn't a spoiler at all guys. All I'm saying is I'm not planning on killing him off at this point in time or before I've done him justice. Ok, glad that's cleared up.

To the second point that I'm getting asked about a lot- the plot. I'm not gonna give plot spoilers away, but I am planning on making this a fairly long plot, and if you don't pay attention you will miss small details which will eventually intertwine with the sort of epilogue when Tessa finally shows up.

And lastly to the third point sorry this is so long guys. I have a twitter account! It's been long overdue honestly, but there was no use delaying it any longer, my name is laurenathalasa and should be no shocker to you guys. I'd appreciate it if you'd address questions to me on there as otherwise I have to constantly repeat myself or write it in one of these ridiculously long A/N's. Also feel free to tweet if you just wanna chat- that's more than welcome. Ok, without further ado:

Magnus lay in his bed alone for the first time in what felt like 6 months. It was hard to believe that Alec had only turned up in living room a month ago. Although, he had spent the rest of the time being tortured which Magnus had to keep telling himself that he was powerless to stop. Even now he didn't believe it. He had been lying like this for the last hour in the dark staring at the ceiling. He had left Alec in his room before that. The boy needed rest. As much as Magnus wanted to cling to him like bees do to honey, he knew that Alec needed rest. What was happening to Alec though? And Jem… Magnus had never thought that Jem could hurt anyone, but there he had been, trying to strangle Magnus' boyfriend. Alec being able to project thoughts… and hear them… at first Magnus would have thought he was inheriting the gifts of the silent brothers, but he had looked into it and they were done in complete different ways.

For the brothers, they communicated through runes. The thoughts weren't projected themselves, whereas Alec had literally thought and it had appeared in Magnus' head. As easy as talking. Something only angels could do. Which unnerved Magnus. Alec couldn't really be turning into an angel could he? No that was impossible… But it was happening. Magnus hated not being in control, but he had to accept it; if any shadow hunter was going to turn into an angel then of course, of course, it had to be his little Alexander.

There was a knock at the door. He told whoever it was to come in. He was still fully dressed. He hadn't been planning to sleep anyway. The first thing he saw when the door opened was a mane of black hair in the dim light. At first he thought it was Alec, but looking closer he saw it was Will. That surprised him. He stared at Will openly.

"It's rude to stare." Said Will quietly, but his head wasn't in it. Magnus could see right through him.

"What do you want Herondale?" He growled, far too tired to deal with Will.

"It's about Jem, I wanted to see if you knew anything." He sounded almost hopeful. Magnus sighed. He prayed he was wrong, but he would have to tell Will everything, Will deserved to know, he was Jem's parabatai.

"I think- and I hope I'm wrong Will- but… What was the number you said Jem kept saying?" He asked. Hopeful he had heard wrong or something. He hadn't. Shocker.

"666" Will said. The answer was quick, it was also surly as if to say 'ok ok, now get on with the important stuff.'

"And that doesn't mean anything to you? You the one whose read more books than all the librarians in London?" He asked incredulously. How did Will not know? He was a freaking shadowhunter for God's sake!

"No… I don't think so… Unless you mean-"

"6 Is the devil's number!" The both shouted. Magnus shivered.

"Don't do that again." He said.

"Jem's possessed by the devil. Are you being serious? You're insane! Jem? Really?" Magnus went back over his theory. Yes, it made sense he thought. Time to try it out on someone else.

"I think," Started Magnus, whilst Will settled himself in a chair, "That Yanluo must be an ancient embodiment of the devil."

A/N: Alec's point of view (same time)

Alec leaned against Magnus' door. He had been about to push it open when he realised it was already open. There was a crack in the door, and quite a large one in fact. Alec smiled. Helpful. He looked through though and felt himself scowl. Will was in there. Why is Will in my boyfriend's bedroom? He asked himself irritably. Then there seemed to be a voice in his head that told him to shut up and listen. He shut up and listened.

"Yanluo must be an ancient embodiment of the devil. Think, why would Yanluo want Jem? I think taking him with us to rescue Alec brought him close for Yanluo to possess him. The Chinese are one of the most ancient races, and doesn't Jem himself hail from Shanghai? Yanluo literally means in the old warlock language 'angel of death' Will. I truly believe this is what happened to Jem. This all started with the violin yes? You only need a piece of the person in order to possess them. Jem's violin is one of the most important things to him. We heard those guards talking didn't we? I've been thinking about them too. They said that Yanluo wanted to try to possess a shadowhunter with a demon. We didn't think about it. The demon is Yanluo, the shadowhunter is Jem."

"Then what about Alec? He's not exactly normal is he?" Alec heard Will ask. His heart skipped a beat. Was he possessed? What was happening to him? Will was right, he wasn't ok.

"I believe in a balance. A very important balance taught to me years ago after I received help from the Seelie Queen. There must always be an equal balance between good and evil. Alec is the good. An angel lives inside him. It was put there to try to stop Jem."

Alec didn't breathe. He couldn't. The air seemed too thick, almost too hot to breathe in, as if I would burn. Did that mean he had to hurt Jem? He couldn't… Even if Jem was possessed by Yanluo, there had to be some other way.

"If your boyfriend touches my parabatai I will hunt him down." Said Will. He voice was sharp enough to cut through Magnus' own steely gaze.

"As I recall Will Herondale your parabatai said something along the same lines to my boyfriend tonight. Don't make me threaten you Will Herondale."

Alec could tell things were escalating, but he didn't want to interfere. He felt like he was listening in on something important.

"You won't need too. Help me with Jem Magnus Bane and I will help you with Alexander Lightwood. I swear by the angel." Alec didn't hear a response. He assumed Magnus had simply nodded or something. Then;

"You can come out now Alec." Magnus' voice. Oops.

"Sorry." Will laughed.

"How are you descended from me?" Will asked.

"I don't think I actually am." Said Alec. "Or at least, you sound more like Jace than I do. Plus don't you hate Lightwoods?" Will nodded.

"Yes Lightworm… So Magnus, are Alec and I related? I'm curious now. I mean I've already got one long lost decendant, why not another?"

"Because it would be incredibly embarrassing for Alec who was in love with Jace Herondal-" Magnus started. He was cut off by a blow to the ribs.

"Shut up!" Alec glared at him. Magnus laughed despite himself.

"And no I don't think so really, the only ancestor who would be around about now would be Will's sister… Um… What's her name? Cecily?" Will looked horrified.

"Cecily marries a LightWORM? I just hope by the angel it isn't Gabriel… He's never forgiven me for breaking his arm." Magnus whispered something to Alec.

"What's your middle name again?" Will's head snapped up.

"Oh God it isn't Gabriel is it?" Alec laughed.

"No actually, it's Gideon."

"Well, there can be no doubt. At least Gideon's moderately bearable."

It was then, to everyone's surprise that Sophie and Jem stepped into the room.

"Oh great now it's a slumber party!" Announced Magnus, not fazed at all it seemed.

"Excuse me but what, Mr Bane?" Asked Sophie politely. Jem laughed softly, and whispered "Don't worry." To her. She blushed. Jem turned to Will.

"And you're only moderately bearable to most people you semi-heartless bastard."

It was banter Alec knew. He smiled. This was more like the Jem he knew. Magnus gave him a look as if to say "Don't trust it or let your guard down". Alec didn't.

Alec couldn't really stop tears coming from his eyes as Will ran over to Jem and hugged him within an inch of his life. Magnus took his hand. Sophie seemed to feel out of place, but her eyes were locked with Jem's for just a moment. It was cute. When Will finally pulled away there seemed to be a silent understanding between the parabatai.

"Sophie would you mind helping Jem with his yin fen?" Asked Will. Sophie blushed again. She turned her head to hide it. Jem took her hand as they walked out of the room.

"Well aren't they adorable!" Exclaimed Magnus.

"They'd be more adorable if they'd figure out what they are!" Said Will in a tired sounding sigh. He looked happy for his parabatai, but also a little sad.

"I'm going to bed." Will told the pair, before striding away. Alec wished he were half as confident as Will was in himself. He wasn't sure he was a sixteenth. Magnus grinned.

"I think we're going to bed soon."

And the horrors were forgotten.