[@Cyclone] The 'can't be worked' is universal and won't change, it can't be melted and if you hit it, it will either not react or break.

And honestly, I don't think it's a concern. At all. Dragons have little to offer except for awesome factor and if their scales had the durability of say, bones, then a single guy with a machine gun would be a match (And arguably, it can still be considering how the eyes don't have scales on them)

Big is not a strength. It's awesome, but ultimately it's a weakness. Just more exposed surface.

So what I want is something awesome but that won't immediately get one shot by anything.