One of the three common elements in web novels was battle energy, demonic energy, and spiritual energy. Combat Aura usually referred to the offensive power that humans cultivated or were born with. It could be used to fight or cast magic. In fantasy novels, battle energy was described as a mysterious power that could be strengthened through cultivation and refining special items. Demonic Qi was a kind of evil power that could be used by humans or demons to cast magic or perform evil acts. In fantasy novels, demonic energy was often associated with dark and evil elements. Reiki was a more abstract concept. It usually referred to the power or energy that existed in nature. It could come from all things in the world or special objects. In fantasy novels, Reiki was described as a mysterious power that could be strengthened or mastered through cultivation and exploration. These elements were widely used in online novels, and the elements in different authors and novels were different.