Hate to open an old wound, but...[night of J&L Potters' death]

[Martin Smith]

No: HPFGUIDX 26258

     Message: 23
   Date: Tue, 18 Sep 2001 00:42:28 -0000
   From: mellienel2 at yahoo.com
Subject: Re: Hate to open an old wound, but...[night of J&L Potters' death]

--- In HPforGrownups at y..., blpurdom at y... wrote:
> --- In HPforGrownups at y..., mellienel2 at y... wrote: 
> > Kill a person, you have their whole being, 
> > and that comes out of the wand.
>  
> This of course raises an interesting question: what comes out of a 
> wand in relation to various spells when Priori Incantatem is 
> performed?  We saw a miniature Dark Mark appear from Harry's wand 
> after Crouch used it to fire the Dark Mark into the air; we saw the 
> shades of the people Voldemort murdered with his wand.  What would 
> appear if the spell were Cruciatus?  Imperius?  A simple 
Alohomora?  
> Any thoughts?
> 

Yes. I think a lot. Especially about what would happen if you make a PI (Priori Incantatem) on a wand that itself has performed PI:s. I see a few interesting possibilities here:

1: The anonymizer effect
Quite useful if you're a DE or some other bad wizard and know you have cast a spell you wish to hide. After your evil deed, you perform a PI on your own wand, after that a few harmless spells and that's it. When an auror catches you, saying "Let's have a look at this little wand of yours, shall we?" and performs a PI. Your wand spits out a few harmless spells, then a PI, which has the effect of spitting out the same harmless spells as before (only in reverse order and a little weaker) and there's no sign of any evil-doing in this wand.

2: The antiescalating PI chain reaction effect
A wand on which PI has been performed spits out shadows of its previous spells until it hits a PI it itself has cast on another wand, which now spits out shadows of shadows of the other wand's spells until the other wand's shadowshadowspell is a PI on a third wand, which leads to shadows of shadows of shadows of... OK you get the point, right?

3: The bouncing spell effect (AKA Ferret effect :-))
A wand that has performed two PI:s gets PI:ed. Once hitting the PI, the spells reverse and hits the other PI on which they bounce back to the first PI, and then back again, and so forth. Can also be used as an anonymizer.

I like to see the PI to something of the effect of a sine curve, such as y=a/x*sin(bx) .

But hey, I'm not done yet;
In PI, the spells come out in reverse order, right? Do they also come out in reverse effect?
Some say, no, of course not, what kind of silly question is that?
But undoubtely Cedric, Bryce, Jorkins, Lily and James were _killed_ by AK, but when PI is done they _come alive_ to a lesser extent, which, IMNSHO indeed is the reverse effect of AK.
Yet, when Harry's wand is PI:ed in the woods during QWC a shadow of the Dark Mark is to be seen, which is not the reverse effect. The reverse effect would be something like a light mark (perhaps an image of a cosy teddy bear or a smiley).
So which is it? Reverse effect or the same effect? A flint? I stand perplexed.

Martin, L.O.O.N. by contest, and actually recently certified Open Water Diver