The hero battles the Demon King, but there is no Demon King at the end of the labyrinth.
A black bird roams the labyrinth.
It transforms into a black dragon to hunt down adventurers.
It transforms into a venomous insect to poison explorers.
"Magic Mirror, Magic Mirror, tell me where that evil black bird is."
"Please wait a moment, brave hero."
"Magic Mirror, tell me how to kill that damned bird."
"Please wait a moment, brave hero."
"Magic Mirror, tell me the best way to roast that bird so it tastes delicious."
The Magic Mirror paused for a moment, then said helplessly:
"Hero, haven't you realized that I'm the bird?"
This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.