Greatest Warrior of The Multiverse GWoM

Dropped due to negativity( Don't leave comments etc. I Won't read...)
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This is the story of Nion, the Saiyan who became the greatest warrior of the Multiverse.
Nion was and is the greatest scientist, dimension traveler, Universe traveler, time traveler, Hero, Villian, and many other things of the Omniverse. The most important is Warrior though because he believed and still holds himself a warrior in his heart.
However, No one knows that this warrior used to be an ordinary human on earth until one day...