Yeah, they're terrors - at least in 3.5, while Challenge Rating was always a bit of a joke since the developers barely understood their own system, Dragons were also deliberately under-rated in order to make sure they would be a challenge.

So the inventor turned it to paste. It started by trapping the weaker party members in a corner so it could breath attack them and then pick up easy crits on the basic strikes to recharge it, but the fucking inventor got all the crits instead and took off a full quarter of its health with each of their stupid 2(2d12+2d6)+1d12+1d10 damage. It went from over half health at the end of round 3 to dead in the middle of round 5.

This always happens when I get to play a smart enemy, I roll like dog shit at a critical time and one of them pulls out a string of crits. They were all lined up and half melted and they just spread it's brains across the ceiling.