Heavenly Formless Demon

[Ding.]

[The requirements have been fulfilled.]

[The user would be informed of the world's secret.]

Many phrases began to run through my head as images flashed before my eyes, and I could see them whizzing by as they did.

I didn't get a lot of information. However, I had to pay attention because it was significant enough.

In a nutshell, there is a wall that separates this world from anyone outside of it. Heroes, though, have been something entirely different since they are called upon by the people who live on this planet.

However, each time the barrier is breached, it becomes weaker as a result of their summoning and eventually heals.

The time required to heal it, on the other hand, was exactly a century.

As a result, throughout the following century, this world was in peril. In reality, demons have already entered this realm, but they are still cloaked in darkness.

Because only the lesser demons have been able to breach the barrier. This world's barrier denied any powerful demon as