Hmm, not sure how that'd work. A piston extender would be pretty awkward to set up in the right place, and a single piston would only raise a single block, which they could jump over. Though the old doors and pressure plate setup might work. Hmm. So long as doors still aren't flammable. Can't remember if they are.
A charged creeper blew up the doors on it. So now I have to have a dirt bridge across the moat to get the grass to grow back around the drawbridge. Guess it's my own fault for trying to fight creepers with EE-provided lightning.
If you look at the races, you'll see that being able to use magic varies depending which type of the races you pick. I'm pretty sure 6 of them use magic. The exceptions are the Alpha, Might Auto, and the Transmorphic.