Devil Fruit Era: Awakening of the Thunder Fruit at the Beginning

Su Chen traveled through time and came to an urban version of the world of One Piece. In this world, there are three colors of Haki, six types of navy, and even devil fruits! However, there is no One Piece manga in this world. Su Chen awakens the Thunder Fruit at the beginning and uses endless thunder to kill all enemies! He even has a mysterious panel. As long as he practices or kills enemies, he can gain proficiency, thereby infinitely improving his abilities. Unknowingly, Su Chen seemed to be invincible! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.