DMZ2112
Chaotic Looseleaf
Problem is that without spells dragons have hardly much ability to affect the world except for the BBEG approach of sitting in a place and attacking anyone who comes close. It also makes them more like sitting ducks for well prepared adventurers if you run combat as war.
As I said before I'm torn on this point... on the one hand, I think dragons ought to be able to do whatever the dungeon master needs them to do, but on the other I fully acknowledge that's stepping into "you're dead because I said so" territory.
Not that there's anything wrong with dungeon master fiat, but it's just so much more satisfying to crush players' dreams with the RAW.