A Nightmaren is the name for one of the denizens of the realm of Nightmare—the place where all bad dreams come from. Created by Wizeman, they invade the dreams of humans to steal their Ideya; causing horrible nightmares in the process. They five Ideya represent the dreamer’s Courage (red), Purity (white), Intelligence (blue), Growth (green), and Hope (yellow), so it’s also not too unlikely having them stolen can have some adverse side effects on the dreamer, as well. In other words, I’m a spooky nightmare monster.