A/N: I disclaim the Ben 10 and Teen Titans universes; they belong to Cartoon Network and the latter to Warner Bros. and DC Comics. I hope you enjoy this crossover, and please read its prequels, Titanic Sourpuss and Jinxed!

Prologue: The Meeting

The Forever King had gathered the Knights in his throne room when the messenger came.

"Sire, the one you wish to treat with is here. But there is one more who came to treat on his own accord."

"Let them both enter."

The messenger bowed and to the back to the door at the back of the room. All the Knights watched as the two figures, one of who was significantly shorter than the other, entered and walked towards the king.

"Why have you rescued me?" asked the taller one, who had silvery hair, red eyes, and a red jacket. "I was the one attacked you before this form was damaged!"

"Are you truly a Galvan in a human body?"

"I am," he said, his face turning sour. "Unfortunately."

"If you build the machine for us and help us destroy the dragons, you will get both your revenge and your original form. Do you accept?"

"I do." He looked somewhat happier when he said this.

"And what do you want, small one?"

This person was rather short and cloaked.

"I have information about four sources of power for the machine. If you capture them and use them, I wish you to hand them over to me once you are finished. Do you accept this, Forever King?"

Said person thought for a moment and then reached his decision.

"I accept your conditions. Now, where are these sources of which you speak?"

"I recommend that you undertake the project in your castle nearest to Jump City, as that is location within which the sources reside."

A/N: Okay, so the Knights have just stuck a deal with two mysterious guys. I'm pretty sure you can tell who the first one is if you've seen Ben 10: Alien Force. The other one? Well...I tell you later. Please feel free to review and speculate. Hope you enjoy this!