When the three siblings return to the school, they find that the teachers and students are still awake. They immediately go to investigate, and discover that the three of them have been chased by a pack of calamity spirits. The three siblings explain that they are the ones with the most calamity spirits, and that they have been chasing them because they were the ones who chased after their brother. They explain that calamity spirits can be divided into three levels: heaven , earth , and human . Heaven is the highest level, earth is the lowest, and humans are the lowest. The third category is human, which means that the spirits are in the lower human levels. This means that they can be destroyed by the flames of samadhi, but that they cannot resist the flame of divine skill.