Quote: Now, as far as I'm concerned, one of the stupidest things in D&D is the rust monster. I can't even imagine an ecology where the thing wouldActually, Bob, I can think of at least one place. Given that D&D has the Elemental Planes, I honestly wonder if the critters might be native
survive, let alone evolve.
to the Elemental Plane of Earth...and given that we've also seen subplanes in the books, a Metal subplane wouldn't be impossible. Either one would
allow a creature to evolve that ate metals. Add in curious wizards with planar travel spells (who don't use THAT much metal themselves), and who might
think that they'd make useful pets, and they're on the Prime Material Plane before you can say 'Bob's your uncle.'