A novel with a level of fighting spirit
There were many novels that had battle energy and levels. The more famous ones included Battle Through the Heavens, Martial Universe, Douluo Continent, and so on. In these novels, fighting spirit was an important concept used to express the martial arts and strength of the characters. Battle energy was a cultivation method that could improve one's battle energy strength through continuous cultivation. In novels, there would usually be a clear hierarchy system. According to different levels, one could cultivate different battle energy techniques and battle energy skills. The strength of different levels would also be different. In "Battle Through the Heavens", the protagonist Xiao Yan encountered many difficulties and challenges while training his Dou Qi. He needed to continuously train and fight in order to increase his level and strength. In "Martial Yin Yang", the main character Lin Dong had to constantly challenge himself and other powerful opponents in order to improve his skill level. Vengeful novels would usually describe the protagonist's growth and struggles, as well as their grudges and complicated interpersonal relationships. These novels were deeply loved by readers and were widely spread and read.