Disclaimer: I don't own bleach.

Chapter 1: A story of Revenge

Deep below the first division barracks is the Muken. The lowest underground prison in the seireitei. Deep down inside this prison was a orange haired prisoner. Other then his lower face and his hair nothing else was visible on his body. His entire body was covered in seals to prevent him from escaping. But right now he was completely powerless.

How did Ichigo get put in this underground prison? It all started three years ago. It was a few months after Aizen had been defeated. He was living a regular life. Or was trying too. His friends weren't talking too him anymore because of him turning full hollow in his fight against Ulquiorra Cifer and almost killing Uryu. Even though he wasn't in control his friends still despised him. Ichigo made many attempts to talk to them but he stoped after Uryu almost took his head off with an arrow.

If his life wasn't bad already he soon got a letter from the Gotei 13 inviting him to the seireitei. Ichigo didn't know why but he felt a bad feeling from that invitation. But he soon found out why when he arrived at the Gotei 13 meeting room. Every single Captain and lieutenant surrounded him including the Head Captain of the thirteen quart guards and his friends with serious expresions on their faces some were out right glaring at him.

Finally after what seemed like an eternity Yamamoto's loud booming voice informed him of why he was really here. Apparently he was getting arrested fot disobeying rules when he went to Hueco Mundo to save Orihime when he strictly told him not to and he brought a lieutenant and a seated officer with him, reffering to Renji and Rukia.

Ichigo felt multiple emotions at that moment. Anger, Shock, and sadness. Did his previous actions truly mean nothing to them? He saved Rukia from being executed. He made Byakuya realise that he should protect Rukia. He saved Orihime from the arrancars. He stoped Aizen from going to the Royal palace amd killing the soul king which would have destroyed the entire world. Did they really only think of the bad things he did to help others? It really made him question why he even helped others in the first place. Without thinking much Ichigo muttered the words 'Bankai. Tensa Zangetsu.'.

His friends and the Gotei 13 almost immediatly got ready to fight the orange haired substitute shinigami. They knew he would retaliate that's why they all surrounded him at first. Almost everyone there hated the subtitute shinigami for some stupid reason. Orihime hated that he never realised her feelings for him and that he would have killed both Uryu and her if Ulquiorra hadn't interfered. Uryu hated how he would be so oblivious and how he was almost killed by the subtitute shinigami. People like Byakuya, Soifon, and Yamamoto hated how he would break their rules and get no punishment. Rukia hated how he was so weak to let his hollow take over his body. All at once, they rushed at him. That fight between Ichigo, his friends and the Gotei 13 was quite long, lasting almost a day. But in the end, Ichigo lost. Rukia delivered the final blow and Ichigo was taken to the Muken and his zanpakuto had been taken away and sealed away. Three years later. Those three whole years living alone and not being able to do anything caused Ichigo to slowly lose his sanity. Now he had none of his sanity left as he talked to himself most of the time. Right now he sat in a black chair that completely restricted his movements and eyesight.

"Ah, Days pass quite slowly down here don't they? How many days have past since I've been locked down here? You lose track of time quickly." Ichigo said, talking to himself. Not noticing that there was another organism with him.

"I guees being traped down here for three years truly has made you go insane to the point where you can casually have a conversation with yourself. I should have seen it coming since you are only a human right now with massive uncontrolled spiritual preassure." A raspy voice said.

"Oh? A guest. I haven't had one of those in a long time. Today must be my lucky day. Who do I owe the pleasure? I don't think I've met you before." Ichigo said. "I would offer my hand but I can't move too well right at the moment."

"I'm not what you would call a guest as I've been here far longer then you have, but if you'd like you could call me . I've been observing you for the past three years and I know you'll be perfect as my new host."

"Explain."

"I thought you were going to ask that. A thousand years ago Oetsu Nimaiya created me to be a sentient substance with one goal: to protect the soul society. But as a lived in the Royal Palace I quickly began to gain knowledge and as I watched the soul society from above I gained a new goal. I needed to fix the world. Every day in the Rukongai people were getting harrased, injured or even killed and the Gotei 13 never took the time to even acknowledge these problems. I sought out to eliminate them. Nimaiya soon noticed this and figured I would be too dangerous so he locked me away. But my intelligence just kept growing and I escaped from imprisonment. I landed in the Soul Society. I realised that to fix the world I needed a host. After days I bonded with a man named Cletus Kasady. An insane man with bloodlust. We destroyed the walls made out of seki seki stone that protected the seireitei. Soon after that we caused havoc. Not long after we entered the seireitei the Gotei appeared. As the fight between us continued I kept on evolving causing Yamamoto to release his bankai witch inevitably defeated me." It paused before continuing. "I've went through your memories and we have something incommon." Ichigo raised an eyebrow. "We both despise the Gotei 13. Even if you don't show it you still hate them for imprisoning you here. So let's work together. If we do that we will both be able to get revenge on them."

Ichigo silent for a moment before he started chuckling darkly which soon turned into an insane laughter. "Ah what the hell. When will I ever get an opportunity like this ever again. I accept."

A loud explosion was heard in the middle of the the seireitei creating a big crater. Ichigo walked out with a big smile on his face.

"Woah! Haven't felt the breeze of fresh air in a long time." Ichigo said.

"Hey stop right there!"

"How did a prisoner escape the Muken?!"

Ichigo turned to see a group of seated officers with there zanpakutos' unsheathed and ready to fight. Though many of them were trembling from the bloodthirsty aura coming off him.

"I'm actually quite delighted you're here. Now I can test out my new powers." Ichigo said with a grin that would make Kenpachi proud.

Suddenly without warning, Ichigo's arm turned into a blood red blade that extended to one of the seated officers' and impaled him. The others proceeded to scream in fear and terror. Before they could away though Ichigo created multiple projectiles that shot forwards stabing and quickly killing the other seated officers.

"Not bad. This will surely come in handy."

His next stop was his old home, Karakura town.