Dragon Hunter, I Am the Eternal Chosen God of Resentment

Octavian, the son of disaster, who destroyed the world of dragon hunters in his last reincarnation, Kamui and the Barrier Dragon who want to save the Winged King and be reborn again, Ragna and Crimson, who pass on their skills to the son of disaster and their past selves in order to change the future that will be destroyed by resentment... Gather together! Octavian, who is bound to the System Princess created with the soul of the Winged King, was a Blue Star and a Trisolaran Earthling in the first two lives. With his memory cleared in this life, he/she will still embark on the road to dominance, but he/she will no longer be at the mercy of fate and will kill himself named Resentment. When the protagonist merged with the power of the Lich King and Future Ragnar in Chapter 11, his temperament changed drastically and he gained the ability to switch genders! (System Ji has no memory) There is a female protagonist in this book, but she appears after the first volume. When the protagonist's temperament changes drastically, her love for everything in the world will become distorted, including not limited to killing her lover while falling in love. As long as there is Soul Frost Sorrow, she can be resurrected! (This book is also called "The Lich King is Angry Again in the World of Heavens") [Note 1: The beginning of this book was written during the period of Wing King Karura. Since the Ragnar manga has not yet been completed, the protagonist may go to other worlds in the future. The concept of time traveler in this book is not unusual except for the indigenous people, because there are similar concepts in some worlds, and powerful villains can also create low-level systems! [Note 2: Well, this may actually be because the title tag of a Zhutian fanfic book cannot be changed. In order to realize the advantages of a comprehensive comic fanfic mentioned by readers of a certain book, a chat group may be added later (laughs). Predetermined world: Monster Master - Ancient Corpse Brother - Red Eyes - King Exit... Etc.]