Immortal in Another World: Reincarnated as a Baby and Already Invincible

Protagonist: "For the sake of the world, what if I become a demon?!" Demon King: "Lord Demon God, your sister is in my hands. Before you die, you will kill your sister and bury her with me! Why don't you let me go?" The protagonist's sister: "Thousands of my Taoist friends have all died for the sake of the common people in the world. The demon clan will never be destroyed, and the common people will be in ruins!" After saying this, he destroyed his godhead and his soul was destroyed! Protagonist: Crush his sister's godhead to pieces and use the "Technique of Reincarnation in Another World!"… This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.