Lucifer travels to the world of One Piece, binds the system, and starts to gain the power of the Spirit of Words and Hell Demon. Whatever Lucifer says will become reality, and matter can be summoned or generated through sound. Flash, lightning, fire, ice, lava, gravity, earthquake, all powerful abilities, Lucifer can use. By beheading the enemy, Lucifer can gain kill points and buy more powerful powers. Akainu: As soon as Lucifer opens his mouth, my magma can only be used to light candles. Kizaru: As soon as Lucifer opened his mouth, my flash was slower than that of a turtle. Whitebeard: My Shock Fruit can't even shatter a stone. Kaido: My immortality is invalid. Redhead: Why is my strongest overlord arrogance gone? Five Old Stars: Please, stop talking. Lucifer: I haven't done it yet, why are you empty? Everyone: You didn't do it, but you did. Lucifer: A gentleman speaks but does not act. From then on, a hell demon who used his mouth to beat the world's invincible hand was born.