Fate's Gambit: I Can Control Probability

Kuzaki Kismet obtained the capability to control probability, which allows him to increase or reduce the chance or odds of a specific event occurring, basically making him or anything he desires more fortunate or less fortunate.

After getting the ability to control probability, he utilized it to win lottery tickets and accumulate a great deal of money, taking advantage of it for his own gain for a while.

After two years of honing and training his ability, he started to use his power to benefit humanity by curing illnesses, even cancer. He uncovered the mysteries of the unknown and assisted scientists in uncovering evidence of extraterrestrial life.

He achieved global fame as a billionaire and was highly regarded as a 'hero.'

Soon after, his fame had plummeted. He had manipulated the laws of physics and reality itself, which caused his ability to become uncontrollable and spiralled into complete chaos, leading to the world's apocalyptic downfall.

Unexpected disasters would occur around the globe, resulting in natural calamities, explosions, and other disastrous situations.

It seemed as if the world had encountered the most unfortunate luck and fortune imaginable.

Asteroids started to rain down from the sky, the temperature of the sun decreased drastically, thousands of people perished each day and frighteningly monstrous creatures now roamed the planet.

He had no control over the situation and was forever known as a 'Fallen Hero', hunted relentlessly for years afterwards.

Eventually he realized that he had come to the end of his journey, as his last friend had abandoned him and all his motivation to carry on was gone, as there was no longer any expectation of a positive outcome in the future.

He died in a sorrowful manner, but while he was taking his last breaths, he had wished to start in a different world, a place where he could begin again and make his own decisions, no longer reliant upon anyone else's opinions or advice.

Unbeknownst to him, his power grew exponentially as his probability manipulation yielded a maximum output, increasing the odds so much that it was impossible for the world to ignore it.

His probability manipulation expended all its power trying to complete this task, diminishing his power and reverting it back to the level it was when he initially gained his ability.

He was suddenly transported to an unfamiliar world, and he made a promise to himself to live by his own rules and never repeat the mistakes he made in his old life.