The cultivation method Leo picked is { The void body } You refine your body with chaos energy. Which makes your body able to absorb element attacks and have an extremely hard body. Leo uses Universal creation to make a soundproof device because he needs to activate his chaos dragon bloodline. When activated, his whole body goes to a rebirth which is nothing to laugh at, it is extremely painful. To activate his blood line, he would take a knife, then cut himself and, thinking of all the painful memories of his past, throw his body into chaos, which let him activate the bloodline. Leo goes and does this step by step. He takes a knife and cuts himself, then he starts to think of what he went through.
His childhood friends leave him all alone with no help after his parents died. To being bullied every day by those so-called friends of his with his classmates. He let the raging emotions that had been growing out inside him, breaking down in the process. At this moment, his bloodline was activated. The bloodline pulls the negative energy and natural elements from the world. To refine his body, starting at his blood. When the chaotic energy passes through it, it explodes his blood cells and blood vessels. Then afterward, it rebuilds them from scratch. Next, it moves to his organs, destroying them one by one, with Leo feeling each of his organs exploding. Also, not passing out is one of the hardest things he did by far.
Then, when the chaotic energy reached his heart, he feared for his life. For the first time in a while, he was killed. When his heart exploded, he felt pain and alone. He thought he was going to die again, but then his heart regenerated and, when Leo felt his heartbeat again, he never felt so alive in his whole life. When the chaotic energy passed through his bones he was lucky he was lying down or he would have fallen. Leo started to yell his heart out because it was so painful. Imagine getting all your bones pounded to dust rather than rebuilt but, compared to his organ getting exploded, this was easier.
Lastly, was his muscles and skin. The chaotic energy started to burn and destroy his muscles and skin at the same time. He didn't cry or yell, he was calm. Until the process ended, Leo got up. His body felt weird to him. His body was lighter and felt stronger, but he was not done yet. He took a quick shower and went to sleep and entered the pocket world. When you meet people in real life, you can fight them in different settings in the pocket world. You get rewards for fighting bots. You can die infinite times. And, you can only fight someone 200 times before they become locked from fight.
Leo starts to gather chaos energy into his body, creating a void inside his body that didn't hurt as much as he thought. He shapes chaos energy into a vortex body so it will naturally absorb the world's energy now. After he is done with that, he starts to make the chaos energy go through his body. It's dangerous to do this because you will likely explode. He dies about 120 times before he finishes it. After he finishes, he wakes up and leaves his house. He goes to the local library, which is only a block away from his house. When he walks in, he is greeted by the librarian.
Librarian - Hello. Welcome to the library. What books do you want to read? Or check out? she says with a soft smile.
Leo - Hi, my name is Leo. I want to read books about the history of the world, he says with a cheerful smile.
Librarian - they're in row 3 in the back.
The librarian points to the third row, showing him the way.
Leo - thanks.