1. Death Class: This class is regarded as the most dangerous of all nightmares. These nightmares have caused a handful of people to go insane. I highly recommend you to not inflict nightmares of this class on people. Use these at your own risk.

2. Dream Class: The most lethal and easiest type of nightmare to perform, the dream class nightmare causes people to suffer extreme depression and suicide. What this class does is that it creates nightmares that shows the person's worst fear. When the person wakes up, they will never be healed and they will suffer for the rest of their life. Created by the wizard, Romepius Cripan, the dream class nightmare is now used to this day as a form of punishment.