I have a 19HD character with 10 levels of MoMF and I have a couple of points of confusion. I get the extraordinary special qualities, special attacks and (thanks to assume supernatural ability) supernatural special attacks of anything I turn into. If I turn into, say, a pit fiend, do I get the damage reduction, the spell resistance and the immunities? It doesn't say if they're supernatural or extraordinary.

Also does anyone know of any gargantuan creatures of 19HD or less that can wield weapons? Or ones that threaten large areas?