I'm not aware of any mystical properties ascribed to the plates. They're just ordinary plates of gold.
> from a magic bag
I'm not aware of any bag, especially one with mystical properties. Joseph says the plates were retrieved from an ordinary stone box buried in an ordinary hill, not a "magic" bag.
You're welcome to be critical, but this is just disingenuous.
Likewise, I think you would be more forthcoming in admitting that while LDS does not believe there are any "mystical properties" ascribed to the plates, there were indeed "mystical properties" ascribed to the glasses, the Urim and Thummim, used by Joseph Smith to translate them.
But now that other people have flagged the comment it's not obvious what I selectively replied to.