Okay, so this is my first fanfiction in quite a while. I don't really know how to go about crossovers, but I had an idea and thought I could make it work somehow. The story is basically set after the fifth book of The Mortal Instruments, and after Season 6 episode 7 of True blood - this is basically an alternative ending. I haven't read TMI for quite a while and Infernal Devices is pretty fresh in my mind, but not TMI... however True Blood I am very aware of! I am writing chapter two now. (I also own nothing. But I belong to Eric.)

The building is a glowing white, even at night-time. Rain drops from the sky in small amounts as TruBlood is produced and contaminated in large doses. A blond, tall male is standing on the road nearby with a weak female in his hands.

"Nora," The male says, "Sister, please."

"Mmm, brother…" A soft moan escapes her mouth if anything; veins are throbbing and her skin is radiating. "I feel hot… how can that be possible?"
"You'll be fine. We'll find you an antidote, I swear on my life."
Her eyes close – not for the last time. The blond male then does something astonishing; he levitates into the air. He stops midway to stare at the building below.
"All the vampires," he says softly. "All to die."
A question, perhaps. A consideration. Maybe I should save them, his face says quickly. Maybe Bill was right.
Pamela. Willa, Tara… even Jess. The only ones who deserved to live.
"I'll come back for you, Pam."

Staring down at the sister of his, he hopes that the others will be safe for now. Flying fast across the plain on his way to the only place he knows, Eric Northman ignores the several red tears shedding away from his face.

New York
"Clary, you can't possibly be wearing that."
Isabelle Lightwood smirked in the sexy way that she always does, in her skin tight leather suit. As Clary undressed herself, she collected a new outfit Izzy handed to her.
"Much better."
"I still don't understand why we're dressing up this way." Clary turned around disappointingly, with anger in her expression.

"I told you before, and so did Jace. There's a new species abound, however only one of them. It is possible it could be derived from us Shadowhunters."
"We have so much more to do, Isabelle. What about Jace's fire? What about Sebastian? We can't just spend our nights visiting some goddamn magical species in some ridiculous outfits."
"Clary, it's important. And just think, as soon as all of these events end, you can finally get what you want – not only the thing you've been longing for since you found out Jace was not your brother, but, peace. Can you imagine? Now, take your shoes and get out of here. I'm sure Jace is waiting."
"Indeed, I am."
"Jace, I didn't even see you there.."
"Are we ready, then?" Jace wore a leather jacket with skinny jeans. His blond hair was especially vibrant, and Izzy's was especially bold. Clary felt as if she were staring straight into perfection itself, and that wave of lust rushed over her as she stared at Jace. She wondered just how long she could wait, for this, for him – infact, for anyone. It had become that desperate.

The three of them walked down the hall of the institute as Alec joined them on the way. Into the night air, they drove for miles, hours. Nearing their destination, a luminescent ball of light - like a sun - appeared in the sky. As if electric, voltages of new light shot through the ball making it grow and grow.
"Is that ... is that light?" Jace asked, "Fae light?"
"Yes, it is. But it's not our usual light. It's very different... very, very different. What on earth..." Alec stared into the light as it consumed him. "Oh my gosh. I can feel it. In me."
"Me too," said Jace. "It's like they've set something off in our blood."
"Let's go," Izzy said as she opened her car door. "I want to know what all of this is about."