Voyage: I Was Reincarnated as a Devil but Became a Devil Fruit

Mod traveled to the world of One Piece, but was reincarnated into a devil fruit, the rubber nika fruit. Every Devil Fruit has a soul, and even if it is eaten, the soul still exists. Why can Bucky become the Yonko? Why is Lao Sha so strong in the later stage? Why is Marco so good at being a Yonko? Why Luffy was able to cheat all the way and become the Four Emperors is actually due to Mod. If Mod let the Shining Fruit miss a little, he would miss a little. If the Shasha Fruit failed, he would lose. If the Thunder Fruit failed, he would fail. If the Yuyu Fruit sparred, he would have to sparring. Mod helped Luffy grow up and came to Lavrud because he actually wanted to achieve his goal. So what is Mod's purpose? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.