Pandemonium
A/N. Ever wondered what would happen if Clary knew she was a shadowhunter all along. What if she trained and was the best shadowhunter since the first nephilim, Jonathon himself. What if she was even a better fighter then Jace and Sebastian? This takes place at Pandemonium. Clary knows her power and had mastered it and was able to do anything she wanted with runes. Sebastian and Jace aren't her siblings, she meets Jace in pandemonium (along with Alec and Isabelle) and Sebastian and Simon are her best friends.
Clary's POV
I was on the dance floor with my best friend Sebastian, looking out for any demons. I spotted lycanthropes, vampires, and even a couple of the fair folk the first minute I stepped into the club. There was bound to be a demon somewhere, I could feel it. Out of nowhere this boy with green eyes and electric blue hair came into view. I started walking towards him, nodding once to Sebastian to signal its game time. As I approached, the "boy" had straightened up to attention and was following behind me. I smiled, knowing that my rune had worked. I had made it when I was 13, a year after I found out I was a shadowhunter. The rune works like a charm, hiding any marks, making any nephilim appear completely mundane. Heck, I even fooled the clave with the rune back in Idris. The demon was on my heels, not even noticing my companion was hot on our trail behind us. I leaned on the storage room door that said "No Admittance" and slipped inside followed by the creature. The thing turned around and smiled at me, but I could see even through the glamour, the hunger in his eyes. He was already dying to feel my death upon his lips.
"What's your name?" (A/N sorry, but some parts might be similar or direct quotes from the book.
"Clarissa."
"That's a nice name, do you come here often?"
I had to giggle at that. Well this demon was desperate that was for sure. "You're asking me if I come here often."
He laughed in turn and came right in front of me. That is when he noticed Sebastian. He froze. I took the chance and brought my golden/silver whip down on its back, making the demon arch scream in pain. I laughed, reveling in the feeling I get whenever I was fighting. My pulse racing, the rapid flow of the blood pumping faster through my veins, the adrenaline. At that moment I ended my rune, showing my real appearance to only the demon. He cursed. Sebastian came right beside me and had just named his seraph blade. "Raziel", he exclaimed and the dagger exploded in eye blinding light. Its eyes got wide, becoming more desperate. "Wait! Valentine is alive, I know where he is!" I rolled my eyes. Stupid things always claiming what they don't know. "Yeah, old news, I already knew that about 10 years ago." It's true; I had tried to track my father and had found that Valentine was alive. Not only did the rune show me where he was but what he was up to and all of his past. "So, are there any more of your kind here?" questioned Sebastian. "I don't know what you're talking about", chocked the demon. "He means demons. You do know what demons are don't you? Demons, religiously defined as hell's denizens, the servants of Satan, but understood here, for the purposes of the Clave, to be any malevolent spirit whose origin is outside our own home dimension --"
"That's enough, Clary. Nobody here needs a lesson in semantics or demonology" Sebastian pointed out, clearly bored in all this small talk. Knowing I should probably get to the point before he tries to get away I took Raziel from Sebastian's hand and thrust it right through the demons chest. Black liquid exploded from the hole and from its mouth as it tried to say something. There was a gasp behind Sebastian and me and it was then I knew that we had company.