Hero: I've come to slay yo -- what the fuck is this place?!
Boss: Ahahahahahaha! You ask questions, but why...? *burp* I am everything you want me to be, mortal. Why would I be what you cannot see? What you cannot feel? What you cannot experience?
Hero: Uh, well, I've come to... umm... slay you? I think? I don't know anymore.
Boss: Fear not of me! The madness I bring, however... Run far from it... It cannot be controlled. I can give you a *belch* hug if that's what you need. I can see the hole that you possess unknowingly.
Hero: What are you? You're nothing like the other monsters!
Boss: That's because I am not the monster... The monster, is a part of me. It's not me, but at the same time... It is. You may not know it, hero. There are reasons why you are traversing the world to slay monsters, reasons that are a part of you, but aren't you.
Hero: This place is giving me the creeps. I feel like the longer I stay here, the closer to madness I get. Why am I talking like this?
Boss: Mortal, you are standing in darkness. It is everything that we are not. If you are a good man, you will become evil. If you are an evil man, you will become good. Darkness is the embodiment of our greatest fear manifesting into a personality that consumes us... It cannot be fought off. By the time you try, the darkness had already won.
Hero: I... I can't. No! I will not!
Boss: It appears that your madness will be the end of my own, mortal. Embrace it. Let it consume you. *hiccup* Become what you slay! Become what you fear!! Become what you are not!!!
Hero: Ahahahahahaha! I've always wanted a monkey's head as a trophy!
Hero: Prepare yourself, you foolish animal. This is going to be a slippery end for you! And yes, it will not involve bananas... But it will involve splitting!!!
Boss: Yes... Mortal... Free me!
Boss: The only weakness madness has, is when it has to face itself! Ahahahahahahah!