C2198 Why Do I Not Remember?

It was a pair of ancient-looking doors. They were about ten feet tall and twenty feet wide. They emitted a dark purple light, and the surroundings were filled with seven-colored mist. At a glance, it was faintly discernible, and it seemed to be near or far away. It was hazy and blurry, making it hard for people to see clearly.

At this moment, everyone's gaze fell on it without exception