The "Spirit World War" refers to a fictional conflict often depicted in various media, where spiritual entities or beings engage in battles that affect both the spirit realm and the physical world. This concept is commonly explored in anime, video games, and literature, where characters may possess supernatural abilities tied to their spiritual nature. In these narratives, the war typically involves factions of spirits, such as ghosts, demons, or angels, each with their own motives and powers. The outcome of the conflict can lead to significant changes in the balance between the spirit world and the human realm, impacting the lives of both spirits and humans alike.