Chaotic System: A Former Assassin in the Game of the Gods

For too long, Riku was content with the simple life of a sushi chef. Having left behind the hectic life of an assassin, his knife now only knows the flesh of fish and food as he hones his craft with both the poor and rich alike. His skills translated well into running his restaurant, his professionalism and dedication to having a perfect record refusing to leave him even in such a low stakes job as running a sushi restaurant. 

But then, just as he was cleaning up, he was whisked away to participate in a game that would determine the new god of all existence.

While lacking in knowledge about his new surroundings, Riku is still a professional through and through. Offered with the bounty of having his unconditional wishes granted, the Goddess that summoned him wishes for him to win her this game. Well, then he'll just have to make sure that their victory will be as complete as he could possibly make it... Against fantastical beasts and opponent Champions, his skills as an assassin and a combatant will be put to the test. He'll just have to make this Chaotic System actually work to his favor instead of it randomly spitting out nonsensical situational powers that he couldn't use.

***

The Deep Blue... The home of the Gods... For eons, the Thirteen Gods have lived together in harmony together with the God Father within the Deep Blue's calm waters. Together, they watched over the universe, content with simply observing as they all worked in tandem with their respective aspects to exact their Father's will.

That was, until the God Father died without explanation, and His power locked away until a successor was chosen among His children.

Left with an ultimatum, the Thirteen Gods argued on who should inherit their Father's power. Eventually, the arguments became clashes, and the gods eventually realized that them fighting to the death would spell the end of the world. Thus, an agreement was formed. Each of the Thirteen Gods would choose a champion from the sea of souls to fight on their behalf. These champions would brave the Deep Blue's dangers to reach the very bottom of its depths, and whoever gets there first would grant their patron god the right to inherit the God Father's power.

Or at least, that was the original agreement. One goddess chose to defy her siblings, deciding to take matters into her own hands by choosing a former assassin-turned-sushi chef as her Champion. Granting him a power well beyond the rules of the game, she is certain that Riku would be the one to end her siblings' endless debates.

After all, a goddess of chaos need not to follow the rules...