I read the title and instantly had an answer, then when I got in and read the subtitle "that you couldn't perform without" I instantly had no care.
I ment "that you couldn't perform without" in the same way you would say "I would die if I didn't have my coffee in the morning", you wouldn't actually die.
But anyway, little dig out of the way, although the shapeshifter colour change is very visual, I find that the spectator will be amazed on the gasp, but just as quickly as they breath back out they have worked out that method behind it. If I was to do this other than just for a quick thing for a friend pestering for a cheap thrill, I would tend to do a DL first before changing it, that way the top card can be shown to be different strait after. It's still not likely to be a brain bender, but it does stop someone saying "well it's just that card now".
If I was to pick my favorite colour change I would probably have to pick the cardini change by dan and dave, found on the trilogy (that I don't own but have watched). I love this change because it too is very visual, although it does require a flick across the cards, but mind you the flick only takes a second, and you can end with your fingers seperated which only adds to the illusion. Also unlike moves like shapeshifter and the erdnase change, you also move the card, so if you was to do it with the card face down you could use is as an anit-move. I've also had a play about where you can do the cardini move but end with a face up card instantly turning up in a facedown deck.
Anyway, each to their own, shapeshifter is by no means a bad move and always gets a wow, I just think it's way to well known. It's a shame, youtube has taken its toll on magic.[/quote]