This is my second story and it is one that I have been wanting to do for a while. I have always been a big fan of Beast Boy and thought that he was an underrated character in the series. This fanfiction will take place after "Things Change". I hope you enjoy. Please comment, positive or negative I just want to get to write better. As usual I do not own Teen Titans or Marvel or any of the characters. I own only the plot. Thank you.

Chapter 1: Unleashing the Beast

"Robin to Beast Boy, come in Beast Boy. We need you right now".

Beast Boy looked back at Terra with a pleading expression on his face. He needs to leave but he does not want to leave her. "Go Beast Boy. They need you. You're a Titan, I'm not".

Hearing Terra say these words Beast Boy can feel his heart break. The girl that he had always had a thing for was telling him to leave and forget her. With nothing left to do he slowly turns away. "Beast Boy to Titans, I'm on my way". After saying this he sprints out of the school and towards his teammates.

Meanwhile the Titans were desperately attempting to gain some ground on this new creature that seemed to keep healing, no matter what they seemed to throw at it. The Creature, as they had taken to calling it had broken containment and was now headed towards the woods on the outskirts of the city. "We need Beast Boy, where the hell is he", cried the Titans enthusiastic leader Robin.

Out of nowhere a green rhino rammed into the Creature, sending it smashing into the forest. Transforming back into the green titan, Beast Boy looked to survey his work. The rest of the Titans joined alongside of him. "Did that do it", asked Cyborg. Right after saying this the creature spring back to its feet knocking all the Titans back. And so the battle continued. Raven throwing rocks and trees, Cyborg using his sonic cannon, Robin getting in close to throw punches and kicks, Starfire throwing her starbolts and Beast Boy in the form of a Bear. They seemed to be slowly overpowering the Creature until a random swing caught Beast Boy and sent him flying. He crashed into a tree, snapping it in half. He then was still. With the Titans too caught up in battling the creature to go to his aid. However inside of Beast Boy, a different battle was taking place.

'Master, it's my turn. Let me loose. I must protect the pack", the Beast said. 'No', responded Beast Boy. 'The last time I let you loose it almost cost me my team. You're too primitive, you have no control. We could hurt someone'. 'I'm sorry master but you no longer have a choice. I must protect the pack'.

Beast Boy then lurched his back. He slowly began the transformation. His bones began to break and reset. Fur began to sprout from his skin as he slowly became the thing that he had been trying to suppress for years. He then howled to the sky, alerting the Titans as well as the Creature. They turned around to see Beast Boy, only it wasn't Beast Boy. It was the Beast.

Giving a roar to the heavens, the Beast charged its opponent. The one that dared to attack his pack. With a flying leap the Beast tackled its opponent, sending theme both flying into the forest. The Creature then took off, running deeper into the trees while the Beast gave chase. Meanwhile, the Titans were staring at the space where the two were just standing. Robin had hit the ground hard after a swipe from the Creature.

"I'm going after them", Raven said. "No", Robin said. "We can't trust him. That isn't Beast Boy, he could hurt anyone that tries to help". "But this is Beast Boy, he is still our friend and we cannot just abandon him when he needs our help", said Starfire. "Listen, I am the leader of this team and you will do what I say."

This was enough for Cyborg and Starfire, though they were not happy about it. However, Raven was not about to let Beast Boy fight this by himself. So with one final look at Robin she took off flying into the forest, following the sounds of fighting and ignoring Robin's calls for her to stop. What she found in the forest amazed her. She saw Beast Boy fighting the Creature, and winning. The Creature was swinging and slashing, trying to take down Beast Boy and failing. Not a single shot was even coming close to hitting its mark. However, that was not even the most amazing, and actually a little frightening for Raven. What truly surprised her was the fact that Beast Boy appeared to be smiling. That was when Raven realized that this was not Beast Boy. This was the Beast, his innermost instincts that had completely taken over. And the Beast was enjoying this.

All of a sudden the Beast struck and went on offense. When before he was playing around with his "prey", He quickly jumped into the air, headed right towards the Creature. In midair he turned himself into a Scarab Beetle. He landed on the Creature and quickly went to work, digging his way in its skin and underneath the surface. He then transformed himself into his T-Rex form, splitting the Creature from all directions. With the battle over the Beast then transformed back into human form, yet it was not quite Beast Boy. It was a taller, more muscular version of Beast Boy. Raven quickly flew over to tend to Beast Boy.

"Beast Boy, can you hear me", Raven asked. Slowly, his eyes opened and stared up at Raven. Raven closed her eyes, preparing to tend to the injuries that he had sustained before he had become the Beast. However, she never got the opportunity. Unknown to them the Creature had reformed behind them and a savage swing caught Raven, sending her flying into a tree. She attempted to get back to her feet but it proved to be impossible as she could not even see clearly. The Creature was standing over Beast Boy, the one who had dared to cause it so much pain. While the Creature may be able to regenerate that did not mean it was immune to pain.

The Beast saw all of this through slotted eyes. That creature had dared to attack his pack now it had dared to hurt the one attempting to help him. Where the other members of the pack were he did not know. However he did not have time to worry about that now, he would deal with THEM when this battle was over with. He only had a split second to decide what to do and he quickly decided on his favorite form of action, deadly force.

Thinking fast he quickly morphed into the Inland Taipan, one of the world's most venomous snakes. Leaping into the air he delivered a quick bite right to the neck, sinking his teeth into the Creature's neck he deposited one of the potent poisons in the world. With a screech the Creature grabbed the snake and flung him away. The Creature tried to move towards Beast Boy but found it was not in control of its own body. Worse, it found that the liquid that made up its body was infected and hissing. In a matter of moments the only thing left of the creature was a puddle on the ground. Slowly morphing back into the form of the Beast he made his way over to the fallen Raven, who had lost consciousness. Just as the Beast was bending down to pick up his fallen pack member an explosion sent him stumbling back. Looking up he saw Robin, Starfire, and Cyborg.

The Titans had just arrived to see the Beast standing over Raven. They had seen nothing of the battle between the Beast and the Creature, nor how Raven got injured. It was Robin who reacted first, sending four of his explosives which then sent the Beast stumbling back. "Stay away from her", commanded Robin. While Starfire and Cyborg did not think that Beast Boy would do something like the evidence appeared to be against him. However this was all beyond the understanding of the Beast. All he understood was his own rage at this betrayal.

'First they abandon the fight and leave me to take care of everything, and now they attack me when I'm trying to save another pack member.' Having enough he gave out a loud roar and charged the remaining members of his former pack. Slamming into Cyborg sent him flying while he then swiped at Starfire, knocking her to the ground. Robin tried to hit him with his staff but the Beast easily blocked it. Picking Robin up by his neck he tossed him across the clearing. He then chased after him and landed on top. He then reared back, ready to sink his teeth into the betrayer's neck when he stopped. Robin would later think that it was Beast Boys consciousness coming through briefly to prevent the Beast from killing him however that was not the case. Beast Boy had lost all consciousness the moment the Beast took control. It was actually the Beast that stopped his own attack. He was Beast Boy's animal side and in nature there was no greater crime than to kill a member of your own pack. While this man may have betrayed him, the Beast could not kill him unless he had no other choice.

Before he was able to climb off of Robin a huge blast rocked Beast Boy and sent him flying. It was a combination of Cyborg's sonic cannon as well as Starfire's bolts. This sent the Beast flying through the forest. In his already injured state he had no other choice. He could not kill his own pack. So it appeared they were sending him into exile. While the Beast may be violent and a killer he was also fiercely loyal. So if his pack wanted him gone, there was not much that he could do. Morphing into a falcon he took off. Flying out over the Forest at a speed so fast Starfire would not be able to keep up. The Titans watched as Beast Boy flew off at extreme speed. They all wanted to go after him but he was still the Beast and they were in no shape to fight him. Also, there was no one that could catch him at that speed. So gathering a still unconscious Raven, the Titans headed back to the tower. Hopefully when Beast Boy regained consciousness he would find his way home.

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Meanwhile, thousands of miles away, in Gotham. A pair of eyes watched as an unusual bird dropped from the sky. It was green, which needless to say was not normal for any birds around Gotham. The eyes belonged to that of Batgirl, or Cassandra Cain. She was actually the second Batgirl. Her predecessor, Barbara Gordon, had quit soon after Robin had left for the West Coast and founded the Teen Titans. Arriving at the area where she saw the bird fall she found an impact crater that was surprisingly deep for such a little bird. However what she saw inside the crater greatly surprised her. It was a green boy, though a very muscular one at that. However, before her eyes he shrunk. He got shorter and less muscular until he was just a scrawny green boy that looked to be very broken. Yet he looked familiar to her for some reason. It did not take long for her to place him. When she had taken over as Batgirl, Batman had made her study many superheroes in the world so she would recognize them. Naturally, that had included the Teen Titans.

She remembered reading over his file and taking an interest in him. It wasn't because of what he did on missions. He seemed to be very ordinary in that regard. It was his past that interested her. His past seemed to be a complete mystery to everyone. The only thing they knew about him from before he joined the Titans was that he ran with the Doom Patrol for a few years. And his file was empty on the timeline between when he left the Doom Patrol and when he joined the Titans. All in all, Beast Boy was a mystery and she suspected that that was the way he liked it. Pulling out her phone she made a call to one of the only people that could help. Alfred Pennyworth, butler to Batman. "We have problem", she said. "Come quick as can."

Ok so I am going to try to write this story at the same time as my other. I cannot say how I will update because I do not know. There might be times when I post several chapters for one story before I post another for the other story. I hope you guys like it. This will be a Beast Boy story for the majority of it. Let me know what you guys think.