Jace was curled up on his bed with a book he had tried to finish, but never seemed to catch any time to. Now, with Isabelle out with Clary, he could maybe finish it.

His phone started buzzing on his bedside table. Well, so much for this book, he thought. Jace put the book down and reached over to get his phone.

"Hello?" he said, not trying to hide the annoyance in his voice.

"JACE! I'VE DONE IT!" It was Magnus, screaming loud enough that Jace had to hold the phone away from his ear.

Jace sighed. "Done what?" he asked. He didn't care what Magnus had done, although he was pretty curious why he had called him. Jace thought Magnus didn't want to talk to the Shadowhunters again since he broke up with Alec.

"I THINK I HAVE INVENTED TIME TRAVEL!" Magnus yelled back. There was a roaring sound in the background. Maybe that's why he's yelling, Jace thought. Suddenly the roaring stopped and Magnus had quit yelling. "I want you to come down here so I could show you." He sounded pretty excited. "Oh, and also," he added. "Don't bring Alec with you."

Jace grinned like a mischievous teenager on the other side of the phone. Well, he was a teenager, so it made sense. "Alright," he promised. A promise he was going to break.

Jace finally found Alec alone in the training room, throwing knives at the worn out target on the far side of the wall. "Alec!" he called.

Alec, startled by the noise, turned abruptly and threw the knife in his hand toward Jace. It missed his head by inches and stuck into the wall. Jace's eyes widened. "You missed." he said and pulled the knife out of the wall.

"Sorry, I didn't know it was you." Alec strode over to him and took knife Jace held out for him.

"Doesn't matter," Jace said. "We are going on a little trip." His mischievous grin returned.

Alec's voice shook a bit. "Where to?" he asked.

"You'll see." Jace answered.

"Jace!" Alec was furious. Jace had led him to Magnus's apartment in Brooklyn, the last place he wanted to be.

"What?" Jace asked innocently. "Magnus called and asked me- us- to come over."

Alec's fury was decreasing. "He did? Why?"

They were standing outside of Magnus's door. "I don't know," said Jace. "Something about time travel?" Jace pushed the little buzzer next to Magnus's name. His voice sounded through the stairwell. "WHO CALLS UPON THE HIGH WARLOCK?"

"I do believe you called for a knight and shining armor?" Jace said into the little intercom. He looked down at his clothes. "Or," he amended. "A knight in shining blue jeans."

"Don't flatter yourself, little Shadowhunter." Magnus said and the door swung open. Alec heard Jace growl under his breath. He really didn't like to be referred to as "little". As they went up the steps into the apartment, Alec became aware of just how much time has passed since he had last been there. Magnus was standing in the doorway with an angry expression. He was wearing jeans with holes in the knees and a sparkly emerald-green t-shirt that had LOOK BUT CAN'T TOUCH in white lettering."I thought I told you I didn't want Alec here." he said.

"Well, I couldn't have him moping around the Institute all day now could I?" Jace pushed past Magnus into the apartment. "Now, why did you want us?"

Magnus rolled his eyes. "Follow me." he said and led them into his study. His study looked the same, even with Chairman Meow asleep on the desk. The back wall was cleared and there were runes on it. It seemed that Magnus had made a portal just a short while ago.

"I believe that I can now travel through time." Magnus explained. "Do you see this?" He held up his wrist to show the boys a little watch-looking device. "I can just enter the year I want to go to, and a portal-" he pointed to the blank wall "-will open, and take me there. That is why I wanted you. I needed a test dummy."

Jace narrowed his eyes. "Is that all I am to you? A dummy?"

Magnus blinked. "I thought that was clear to you when we met." He said. "OK, what year do you want to go to? Ooh! We should go to 1917! That was a fun year." He chuckled. He looked at his wrist and started tapping on it. Suddenly, the portal opened, but all they could see was purple. Magnus shrugged and gestured Jace to it. Jace stepped in. Alec stepped in after him.

Disclaimer: I do not own The Mortal Instruments. That honor goes to Cassandra Clare.

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