One Piece: A God-Tier Devil Fruit from the Start, Invincible!

[Invincible + Power Fantasy + Building His Own Faction + Devil Fruits Without Drawbacks + Training His Subordinates] After being delivered by a food courier to the world of pirates, Limulu binds himself to a ridiculously overpowered System. But right after it binds to him, the System runs off! Luckily, it doesn't get away completely. It leaves behind some of its functions and compensates him with a god-tier Devil Fruit: a divine transformation type, the Slime Fruit, a Demon God species, with the form of the God of the Void. The incomplete System can boost the companions he recruits: ten times the cultivation speed and ten times the comprehension. Limulu: “My job is just to recruit people. I'll leave everything else to my subordinates, my companions.” So he can slack off more effectively, Limulu sets out on an adventure in the world of the Pirate King. In the early stages, he travels the world recruiting companions and training them to grow stronger. In the middle stages, he founds a nation. In the later stages, he unifies the world. It's still undecided whether I'll write about other worlds afterward.