A/N: Hi guys! This idea just sort of came to me and I decided to go with. It will end up being a multi-chapter, but not very long. I'm having a bit of writers block with my other stories but I will still be updating them, have no fear!

Warning: This contains spoilers out the wazoo for clockwork princess and city of heavenly fire.

Disclaimer: Obviously I do not own any of these characters. Not even the nameless demons.

She was dreaming. Dreaming of boy with black hair and blue eyes. This was a normal occurrence, she often dreamt about that particular combination. But this time, he wasn't her boy with blue eyes, he was a different one, he was Alec Lightwood. That's weird, she thought, why am I dreaming about Alec Lightwood? The boy was surrounded by demons. There were a few other shadowhunters, she recognised Jace; the boy with James's eyes, but mostly there demons. Suddenly the boy was falling to the ground, bleeding from a gaping wound in his stomach. She felt her heart stop, she felt her world come crashing down.

Tessa woke up sweating and leaped out of bed to set about making a portal. She wasn't particularly good at portals, but desperate times called for desperate measures. "Tessa?" She looked back at the bed, Jem was sitting up and looking curiously at her, "What are you doing?" He asked. "You know how I sometimes get dreams in the perspectives of people I've changed into?"

"Yes?"

"Well I just saw Alec Lightwood. I think I was seeing him through Magnus's eyes. He was dying. A demon stabbed him." Jem was out of bed in a second, pulling on pants and a shirt. "Should I get weapons?"

"Yes, for you and for me. Hurry." Luckily Jem was good at hurrying and Tessa's portal making skills had improved drastically. Jem came back just as she was finishing up the portal, they strapped on some knives, pulled out seraph blades and jumped through, Tessa envisioning the place from her dream and she lept.

Jace felt Alec fall before he saw it. His Parabatai rune was on fire. He looked back and saw Alec on the ground, with Magnus kneeling over him, lying in a pool of blood. Jace felt the blood drain from his face. He ran towards Alec, hacking apart demons as he went, Isabelle was doing the same.

The only people who were actually fighting the demons were Clary and Simon, the least trained pair in the group. Simon hadn't even ascended yet, though he had finally remembered everything about his past. Izzy had been in such a good mood lately that she had dragged them all out clubbing. But walking around, slightly drunk, at night in New York was not a good idea. They had been ambushed, surrounded by more demons than Jace had ever seen outside of an army. They were screwed. And Alec was bleeding.

Jace was quickly losing hope. They were surrounded and there was nothing anyone could do, especially with Alec in his current state, and there wasn't any time to bring in back up. Of course, thought Jace, we save the world twice and then are defeated by a demon mob in a back alley.

Suddenly, two people wielding knives and seraph blades burst through a portal. One was a man, with dark hair and dark eyes, runes covering his arms. Jace recognized him as the man who had been brother Zachariah. His companion was a girl, she had no runes anywhere and she was wearing pyjamas. But she was holding a seraph blade to showing that she was also a shadowhunter. Weird. Thought Jace.

The girl was yelling and pointing at Alec, "Get him through the portal, you can heal him there!" Her and the man brushed past the group and started fighting the demons, holding them back. Everyone stared, Jace was surprised, which hardly ever happened, and even Magnus seemed a bit shocked. "What-?" He started, but the girl shushed him, "I said get him through the portal Magnus, has old age made you deaf?" Magnus picked up Alec and jumped through the portal. Brother Zachariah turned to Jace, "You too." He said, then looked around, "All of you get through the portal!" Isabelle went through the portal after her brother, dragging Simon along with her. Clary grabbed Jace's hand and tugged, Jace come on she pleaded, and pulled him through. He saw the pyjama girl create a force field before grabbing Zachariah's hand and jumping through after them.

They came out in a bedroom. There were bookshelves lining the walls and a bed, which was unmade. This would have bugged Jace if he hadn't been distracted by the state of his brother. Alec was lying on the bed, his blood soaking the sheets, Magnus was desperately moving his fingers over his body, doing some sort of magic on him. Jace rushed to the bedside, pulling along Clary, who he still had caught in a death grip. "Could one of my runes help?" She asked. Magnus looked at her with wide eyes, "I don't know. I don't know what's wrong with him."

A/N: So what did you think? Sorry for the clifhanger, but I will update soon. Please favourite, follow, review or PM me. Really do anything to show your support. Thanks!