Disclaimer: I don't own MI.

This fanfic is going to be relatively short compared to my other one (Tessa's prince); this is most likely the 4th to last chapter. Not so sure though.

Please review! I've got 38 now…so hoping for around 42.

Jace stood there, shocked at what he saw. Why were Isabelle and the others there? He had thought they were still back at Lake Lyn.

"Jace!" Alec said in relief. "This demon thing here—Tenebrius—is one of Sebastian's!"

The demon roared at the sound of its name, and looked towards Sebastian for his next command. But Sebastian merely raised his hand to the demon in a command for it to cease action, and let his eyes trail to Jace's.

"Welcome, brother," he greeted. "You've come just in time to witness my experiment." He then gestured to Tenebrius to do whatever he had asked him to do beforehand. Tenebrius once again raised his two blades and pointed them at Alec.

A bright light that came out of Alec engulfed itself around Alec, who shouted in pain. The light surrounding him slowly made its way to Tenebrius' blades. The blades were taking away the light from Alec.

"Alec!" Magnus shouted. The light ceased to emit from Alec and he crumpled to the floor, unconscious.

"Damn," Sebastian muttered. "The protection of Raziel forbids me to retrieve the rest of the Shadowhunter's life source."

"What did you do to Alec?" Simon yelled. Isabelle was too horrified and shocked to say anything. Sebastian just smirked. "Watch," was all he said.

Tenebrius raised his hands and pointed them toward the ceiling. A dark burst of energy spurted from the tips and crashed through the ceiling. "This is the power of Curatrix's metal," Sebastian said triumphantly. "And Tenebrius' blades are only the beginning of it!"

"Why do you have Curatrix?" Jace demanded. Damn. He thought at the same time. I read in the original Mortal Instruments Legend that Curatrix is able to produce as much metal as the owner would like. "The demon told us one of you Morgensterns had stolen it a long time ago!"

"Do not forget I have the blood of demons living in me," Sebastian said smugly. "I simply transported back in time, to fool you idiots into thinking my ancestors had it!"

"You—," Isabelle started to speak an insult (which was probably not appropriate for the rating of this fanfic), but was interrupted by a figure hurtling down through the hole Tenebrius had made with the burst of energy he had created.

It was Clary.

Okay, so if I confused anybody, quick recap:

-Sebastian stole Curatrix by time traveling to many centuries ago, and used its metal to create the blades Tenebrius has.

-Clary was falling unconscious in one of the chapters, and she reappears in this chapter by falling through the roof of the church.

-Also, Sebastian uses Alec's soul/life source to create the power Tenebrius unleashes.