UNIVERSAL GLADIATOR HALF-MAN HALF-AMAZING

It's been 500 years since Humans won the Universal Gladiator championship. For the right to rule the universe. it's been so long. That the rest of the planets started to look down on the human race. Until he came along. He was favored by an unknown deity. who asked him. What powers do you need to crush your enemies.
Nasir said I need a level up system.
Done! What Else?
I need The Infinity Power-Stone.
Done! What Else?
I need a powerful class. beyond SSS level. Make me a Celestial Summoner.
Done What Else?
Nasir said I need a weapon that will vanquish the stars and sudue my enemies. I need the Battle-axe of escanor.

Go forth my Herald and redeem the human race!
And let them know! You are coming. And you're bringing hell with you!