Disclaimer: I don't own Ben 10 Alien Force or Teen Titans. I'm just a guy who watches them to much.
Chapter 1
Benjamin Tennyson was stunned. Never had he felt such despair, such loss as right then. She lay on the ground before him, in a slowly growing pool of her own blood. Memories of Umbreon flooded his mind as he slowly sank to his knees.
"I-It can't be," He stuttered, unable to do anything else. The images of what happened flashed before his eyes, as he tried to reach for her, tried to help. The one person he thought he could trust with his deepest darkest secrets. The one person who had been with him through it all, now lay dead before him.
"Get away from her!!!" Someone roared. Ben dimly realized it was his one time enemy now friend Kevin Levin, as he was hurled away from her corpse. He couldn't even call up the energy to defend himself as he slammed into the ground yards behind where he had just stood. He could feel the bones in his left arm snapping, but he couldn't seem to make himself care.
"How could you be so careless!" Kevin roared, "Your no hero. Your some moron who got his hands on some weapon with no idea how to use it!!"
Each of Kevin's words felt like a blade plunging into his heart. He found himself only able to flinch away from what he knew was the truth. Then he heard the sound. The sound of pure undiluted laughter. Slowly Ben brought his gaze upon the witch who dare laugh now.
"Hahaha. Oh my god, that is absolutely fantastic! That is going to keep me smiling for the rest of my life!" Charmcaster howled in joy. She was the only reason they were out here in the first place. Out here in the middle of nowhere. Suddenly all the pain and anguish Ben had been feeling ignited into full on rage. He saw Kevin weeping over her body, her head held gently in his lap, make Charmcaster howl all the more. This only made Ben angrier.
Without a thought, he rose the omnitrix into view. Automatically he selected the alien, paying no attention to his choice, and he activated it. Instantly, his rage consumed him. He was barely aware of bellowing his aliens name or the roar that followed, of the shape that rushed past him, or of something flying through the air toward the laughing sorceress.
Only when Charmcaster's laughter was replaced by the sound of snapping bone and tearing sinew, did Ben realize he had turned into Rath. Slowly Ben looked at the irregularly shaped orb that had long sliver strands flowing from it. It was Charmcaster's head, Rath's claw having pierced her head right between the eyes and out the back of her skull.
He vaguely heard Kevin drive off, but Ben knew he couldn't go back, couldn't face them, couldn't face Grandpa. He took off running in the direction opposite the one Kevin went in. He easily covered miles as Rath, but still he ran. He knew he couldn't go back, because he knew he didn't deserve his old life. They might forgive him for what he did to Charmcaster, but not for the other. For he was Benjamin Tennyson Keeper of the Omnitrix, and now the murderer of Gwendolyn Tennyson.