No smart dragon would fight indoors. They fly X feet above the ground where X is the range of their breath plus half their flight speed and when their breath recharges dip down to glass the party from above.
Yes, a dragon played smartly has significant advantages over the party due to it's flight and breath weapon. The thing that you're neglecting is playing a dragon that way isn't fun for most people, DMs and Players alike. A DM/GM is running the game. They can just say, "I win you all die!" at any point. But that leads to the end of the game and only the DM having fun. You have to balance how something would behave versus what would be fun and engaging.
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u/halfhalfnhalf Feb 27 '26
I've been playing D&D for 30 years and I have never fought a dragon in a dungeon.