It was completely impassable.

Digging out a passage? It could be done, but how long would it take? It would be even slower than walking out on foot.

So one had to keep a low profile. When national power reemerged and accounts were settled later, which bird that stuck its head out could possibly survive?

But there was an even more serious problem.

Ability users.

No matter how well the state prepared, could it really have foreseen the emergence of people with supernatural powers?

If such peo