No matter how impressive and terrifying the monster, there’s always something that can defeat it. Most monsters have their own monsters, when it comes right down to it. Their tormentors may be superior powers, but in truth, it may well be the simplest and smallest, most innocuous detail that thwarts the fiercest monster.
It might even be me.

Is it his own greed and hubris, or is it a clever prank I pulled that takes down the mighty monster? Not that it matters, as long as I win the day!
Kept at Bay
Greedy little nightmare,
You stole from me an hour
Of sleep that should have been repose
With twisted, dark and sour
Delirium and horror-shows
Of ghosts and ghouls and glee-
Filled monster tales and dragon-scales—
O! Set this captive free!
For if you deign to torture me
Incessant, sleepless grind,
I’ll out you in a rotten verse
And you will lose your mind.
Have you ever had a nightmare that you were overjoyed to wake up & discover it was only a nightmare?
Oh, indeed I have. I’m very glad to say, not at all often, but boy are those memorable! Hope you’re a stranger to them yourself.
Death by poetry. What a way to go!
I shall endeavor not to cause *you* such harm at any time, however!