To the east of the Great Bright City, there was the land of the ruins. This area was fairly large, and people often came to explore it.
At the far end of the ruins, there was a door. From the other side of the door, it was clear that some light seemed to be coming through the cracks, illuminating the ruins.
This door was rather interesting. It was transparent in nature, but behind the door, there seemed to be more ruins; it was as if a small world existed beyond this door.
Some had walked through that door before, but many who had walked through that door were blinded by the light inside. Some also tried to destroy the door but found they were unable to do so. Some of these people who tried were incredibly powerful, but all to no avail.
Perhaps, because of the peculiarity of this door, many were convinced that these ruins were once the site of the Bright Temple.
According to the legends, this door was called the Portal of Light.