C401 In the Blood Fog

In the bloody mist.

A simple word.

It had already explained the scariness of the Mist Hidden Village.

In order to cultivate the next generation of Ninja, they had also organized a Ninja school.

However...

The graduates of the school had to kill each other.

In the end, only the students who performed outstandingly were qualified to become Ninja.

Therefore.

It was an era of darkness