"This is your brain."

Click. A nice, grey brain, emitting a few colourful sparks, presented the students with the normal, magical brain they all possessed.

"This is your brain on the Dark Arts."

Click. The normal-looking brain had been replaced with a bulging, bright blue mass of seething evil and what looked to be a small, flying pig.

"When a young witch or wizard experiments with Dark Magic- Potter, Weasley, I can see you back there. 10 points from Gryffindor each - the Dark Magic begins to immediately leave an impact on his or her brain. If you continue your abuse of the- Miss Morello, you may either give me that note you're writing or you may eat it. You have fifteen seconds - Dark Arts, your brain slowly begins to deform in order to align with the warped magic that you are emanating. Miss Morello, I see you have eaten the note. Good choice."

Click. A picture of what was possibly once human, but was now a two-legged heap of distorted body and magic. God, Snape hated this.

Why was he the bloody substitute Dark Arts teacher? And why had that stupid bint chosen now of all times to get attacked by one of Hagrid's jackalopes?

"After you have become addicted to the Dark Arts, it will begin to not only warp but also take over the mind, the body, and the magic. Mr Crabbe, you will give that book to me at the end of class.

"Now, as the Dark Arts continue to wreck havoc upon your very essence, you may notice some changes in your thought process. There may be a strong need to maim, torture, and otherwise kill those around your. Likewise, you may also find yourself beginning secret societies to- Potter, Weasley, once again your failure to listen astounds me. Detention with Filch for a week– accomplish your dark, secret desires that have been brought forth by the Dark Magic. As you can clearly see in this picture, the subject is drooling. This is a common symptom of long-term Dark Magic abuse. The subject is also horribly deformed, another common symptom. It is rumoured that Grindelwald, in his early days, at one point had no less than three breasts on his back- stop that giggling this instant, Miss Brown and Mr Finnigan. 15 points from Gryffindor each for immaturity – and an extra leg sprouting from his side."

Click.

NOTES: Tirzah Morello up there is sorta kinda maybe supposed to be me...ish. She's like a Mary-Sue, except not. Notice how she is barely a side character! That note she just ate was a love note to her crush, Lisa Turpin. Or something like that.

This was ended abruptly because I ran out of ideas. Stuff.