Nevek looks thoughtful at the tiefling sellsword's question. "Rare isn't quite the right word. 'Retiring' is closer. They're numerous enough, on the global scale at least, but they tend to spend most of their time in hibernation, brooding atop their treasure hordes. While their metabolism is partly magical, they're still flesh-and-blood creatures, so they need to burn energy in order to function, the same as any animal. To live for centuries as they do, they spend most of their time asleep, which means those who have political aspirations work through intermediaries a lot. Thusly, they're assumed to be rare, because nobody sees them most of the time. Presumably the battle you describe involved one dragon who was in league with this army of cultists, and another who was out of the political loop and thought he could succeed through his own sheer power. Both of them appear to have died for their respective ambitions, but the one who sided with a human faction may still have some allies surviving to carry on his goals, if he had any which were not completely selfish. There's a lesson in there somewhere, I'm sure..."