Hot flames.
In the dark underground ruins, a fire was lit up near the passageway. No one knew when these torches were placed here; these lamps with grease were automatically ignited under a certain force. It was said that everywhere the Balor went, it would burn. Although there were few people who had seen this terrible monster, the legend about it was still spreading in the world. Because in the mortal realm, Balor was a very powerful enemy!
(The Challenge Rating is equivalent to the ancient red dragon, and most of the dragons in the stories were young and adult dragons.)
Going above, it would mean challenging the deities.
The Abyss was a place of chaos and evil. There were many kinds of demons. Almost every day, new kinds were born.
