In fantasy novels, the levels of the five elements usually referred to the energy levels. According to the relationship between the five elements, each element had five different energy levels: wood, fire, earth, metal, and water. The mutual transformation and restriction between these levels constituted the rich and colorful energy world in fantasy novels. The five elements of wood, fire, earth, metal, and water were arranged according to the relationship between the five elements. Wood produced fire, fire produced earth, earth produced metal, metal produced water, and water produced wood. The energy level and state of each element would change according to the relationship between the five elements. In fantasy novels, the five elements level was usually used to describe the strength and status of a character. Some characters with very high energy levels in a certain element could be considered a master or guardian of that element. Other characters might need to cultivate and accumulate different elements to increase their strength.