Normally, the old man would go to the bottom of the Fiend Prison to check it out himself; but the water in the pond was way too poisonous and erosive, and also he felt it too troublesome to do so.
The most troublesome part was that he would feel uncomfortable if he had gone there.
He checked his stomach by rubbing against it and didn't find anything uncomfortable; so he sat down by the cliff's edge.
If the devil was to leave the Fiend Prison, he must come out from here.
The old man had watched the green pond at the bottom of the cliff for quite a few days.
He felt bored and hungry. He lifted his head to look up, and then grabbed his hand at a spot in the distance.
The violent wind whistled amid the cliffs of the first level of the Fiend Prison; the talking and singing had vanished instantly again.
The door of a cell opened, and a thin and tall man was thrown out from the cell and landed heavily on the ground.