Power can be as triflingly fleeting as it may be difficult to obtain. At this point in the thread, many magic items would benefit others far more than to serve as food for a gargoyle.
Stone comes with its own issues, as I don't imagine wounds would be easy to heal...though they could take quite a beating.

This is certainly turning out to be a motly crew of devious degenerates and devilish desecrations. Outcasts, might we all be.  :P
Mostly?...feh.
Sorry, my hype is real and powers in a fantasy setting can easily be nerfed the moment you apply logic to them.