There were novels similar to Douluo: My Martial Soul Nine-Tailed Demon Fox:
1."Douluo, God Ascension Files." Author: Huang Yu Plum Wine
2."Douluo: The Strongest Creature in Land, Sea, and Air", Author: A Pure and Beautiful Boy
3."The Longevity of Douluo's Gu Dao." Author: Draw Sword and Raise the Barley
Douluo Continent's Holy Sword Dragon God, Author: Thousand Spirits Chancellor
5."Man in Douluo, Spirit Angel of Seven Sins." Author: Fu Bai Yi Xiao
6."Douluo Continent: Rebirth of Tang Yuxing". Author: The Poor Student
7."Douluo: Starting from Tensui Academy." Author: Red Dust Rogue Cultivator
Douluo's Light Dark Twin Angel Qian Renxue, author:
9:"Douluo, Don't Blame Me for Eating Devil Fruit If You Dare to Be Violent", Author: White Crane on Cloud Peak
10:"Douluo: My Martial Soul is the Ten Vicious Heaven Horn Ant." Author: Winter Melon Battle Treasure
Visitor from Douluo's Foreign Lands, Author: Author TOuvKv
The following is a detailed introduction of these novels:
1."Douluo, God Ascension Files": Douyi, unfinished, less words, more work. Against the Tang Dynasty against the master, on the surface brothers, with the group, has become a little dance
2."Douluo: The Strongest Creature in Land, Sea, and Air"
Title: Douluo's Strongest Creature in the Sea, Land, and Air
Author: Pure and Beautiful Boy
[Genre: Light novel, derivative doujinshi]
[Status: Series in progress, available on shelves]
The protagonist was reborn in Douluo Continent. Yet, he got Kaido's script. When the most powerful creature encountered a martial soul. What kind of sparks would be produced when the pirate and Douluo systems collided?
Doujinshi books were mixed with a large number of elements, such as mutated beasts and pirates. Alliance, etc. It felt a little strange, but there were too many things and too much content. It felt like it was easy to write. The description of the main character was also quite good, but it was not very suitable for those who liked rational things. It was considered pretty good in Douluo doujinshi.
Personal recommendation level: Good
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In the Douluo Continent's relevant information, there was no indication that the main character's spirit was the Nine-Tailed Fox. Qian Renxue's Nine-Tailed Fox spirit was just an illusion created by Bibi Dong, her real spirit was the Seraphim spirit. Bai Zihua's spirit awakened after he transmigrated to the Douluo Continent was the Nine-Tailed Fox, but he wasn't the Douluo Continent's main character.
From the information given, it was known that Hu Liena's spirit on the Douluo Continent was a sky fox (similar to a nine-tailed fox), Xiao Wu had obtained the spirit condensing bewitching skull bone after hunting a three-eyed demon fox in the Sunset Forest to strengthen her own bewitching ability, Cui Yajie's spirit was also a nine-tailed fox and the nine-tailed fox spirit had a bewitching ability. However, there is not enough information about the specific situation after you have the nine-tailed fox martial soul, such as the direction of development, the improvement of your ability, and so on.
In the Douluo Continent's relevant settings, the nine-tailed fox was a high level spirit, easily making people think of Hu Liena's "Demon Fox" spirit, and moreover possessing the "Charm" ability. In the real life version, there was a magical plot change, Hu Liena was set to have two spirits, including the nine tailed fox spirit and the six winged angel spirit. And Qian Renxue had a single spirit, Seraphim, in the original work, but in the TV series, when she appeared as Hu Liena to hide her identity, Bibi Dong created the illusion of a nine-tailed fox spirit for her, using this spirit in the battle with Shrek. However, he was unable to find out more about the special settings or related plot content regarding transmigrating to Douluo Continent and possessing the nine-tailed fox martial soul.
In Douluo Continent, the nine-tailed fox martial soul had a certain appearance. For example, Hu Liena's spirit was the Sky Fox spirit, a cute fox. And also Cui Yajie's spirit was also a nine-tailed fox spirit. The nine-tailed fox was a high grade spirit, just like Hu Liena's "Demon Fox" spirit, this kind of fox type spirit usually had the "Charm" ability. In the TV series, Qian Renxue had used the Nine Tailed Sky Fox spirit in the battle with Shrek, but this was an illusion Bibi Dong had created for her. Her real spirit was the Seraphim spirit.
In the Douluo Continent's original novel, there was no setting where the female lead possessed a nine-tailed fox martial soul. But there were cases of magical changes in the TV series or the real life version, like combining Hu Liena and Qian Renxue's two characters, appearing with a nine-tailed fox spirit (and a six-winged angel spirit), but this was an adaptation that deviated from the original.
Just based on your simple statement of "my martial soul is a nine-tailed fox", I'm not too clear about your specific question. If you want to ask about the abilities, characteristics, or status of the nine-tailed fox martial soul in certain web novels (such as "Douluo Continent"-related works), then in "Douluo Continent"-related works, the nine-tailed fox is a high-level martial soul. It usually has a "charm", a spiritual skill. If your question is about other aspects, please explain in detail.
Among the works related to Douluo Continent, the nine-tailed fox martial soul had many unique aspects. It was a high-grade beast martial soul. The soul master with this martial soul would increase the number of fox tails as his strength increased. Once he cultivated to nine rings, his martial soul would awaken for the second time and become the ancient super martial soul, Nine-tailed Sky Fox. For example, Cui Yajie possessed the nine-tailed fox martial soul. Although she was a two-ring soul master, she was able to easily interrupt Xiaoxiao's support with a simple charm skill. It was clear that this martial soul's strength was extraordinary. In terms of charm abilities, it was easy to make people think of Hu Liena's Demon Fox spirit, because charm belonged to the spirit type ability, and Hu Liena's charm ability was quite formidable. In some adapted versions, Hu Liena's and Qian Renxue's characters were combined. Qian Renxue was set to have a nine tailed fox spirit, but in the original Qian Renxue only had a six winged angel spirit, the nine tailed fox spirit in the play was just an illusion created by Bibi Dong.
The Douluo Continent's related settings involved the nine-tailed fox demon element, just like Qian Renxue's spirit special effect had the appearance of the nine-tailed fox demon, its special effect was extremely cool and its strength was heaven-defying. In addition, Bai Zihua had transmigrated to the Douluo Continent and awakened his Nine-Tailed Demon Fox martial soul. He relied on this martial soul's innate full soul power to begin his journey of pursuing the peak of strength on the Douluo Continent.
There were many characters with nine-tailed martial souls or similar martial souls in Douluo Continent related works. In the TV series, Qian Renxue possessed the Nine Tailed Demon Fox spirit. When this spirit was used in the last episode, its effects were extremely stunning, even surpassing the other spirit effects. Its power was so great that even Ma Hongjun's Evil Fire Phoenix spirit couldn't restrain it. In "Douluo Continent Animation Peerless Tang Sect", Cui Yajie's spirit was the nine-tailed fox spirit. As a high level spirit, the nine-tailed fox was similar to Hu Liena's "Demon Fox" spirit, usually carrying the "Charm" ability, but it had no effect on the pure spirit attribute Spirit Master Huo Yuhao.