If wizards are the eternal foes of demons, then the Black Prison is the age-old nightmare of the demons.
The Black Prison was a prison established by wizards for demons, originally called 'The First Prison of the Wizard's Alliance'. This prison was hidden deep within the Silent Forest. Hundreds of demons were thrown into it each year, but never had one emerged alive.
Such a prison was like a black hole, swallowing all information.
Thus, it has been dubbed by the demons as the 'Black Prison'.
After the wizards found out about this, they outright changed the name of the prison to 'Black Prison' as a means to deter the demons active outside.
And now, a little creature who came from the Black Prison was standing inside the cabin of the ship.
The captain of the Mist Ship rested his hand on his chin, grinning as he watched her.