DC: With Time Dilation Button

being reborn in the body of a young wana be boxer, follow the journey of kai fox on his journey in becoming world strongest fighter, follow as he learns every martial arts, every weapon, follow as he learns every subjects, follow as he reaches the limit of martial art, follow as he reaches the limits of human body and mind, follow as he searches a way to break the limit, hopefully reaching all forms of combat.

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*WARNING*

this isn't a hero story, nor is it a villain story, this isn't a story about a anti hero, this isn't a story about a guy wanting to save Gotham or even the dc, this isn't a saviour story, this is strictly a story about kai and his journey to the peak of martial, not him saving the universe or the world, so don't ask me why he isn't saving the world when he invents immortally,