Yuuna's sharp gaze stayed fixed on the glowing magic circle hovering before her. The circle emitted a deep red light, pulsating faintly as it spread its glow across the room. It was a detection spell, one she used to monitor her territory—the city she ruled. Like all ruling demons, Yuuna was responsible for her domain, protecting it at all costs. This city wasn't just another human settlement; it held an entrance to Hell itself, making it a critical area to defend.
Her eyes narrowed as she noticed the faintest disturbance ripple through the circle. It was small, almost negligible, but it existed. A disturbance in the magic meant trouble. If there were nothing wrong, the circle wouldn't be reacting at all.