Time and Space Brawl: From the Start, I Got Saiyan Blood

[Alternate universe + urban + lighthearted + System + no female lead + worlds converging] No powers? Then I'll create them! No resources? Then I'll seize them! You don't get things by picking them up. You get them by fighting for them! Xu Jiang never doubts his own abilities. The stronger his opponent, the stronger he becomes, and he always throws a punch at someone even stronger! “You lost. From now on, your Great Fireball Technique is mine.” “A Paramecia-type Gum-Gum Fruit? It's mine now, too.” After half a lifetime on the road, I return with the power to master every world!