Dragon Sorcerer

[Stikye]

Im not sure if this should be a rules or an advice question, but can anyone tell me WHERE dragons get their spells? It isn't explained anywhere, except that as dragons get older they cast. It seems arbitrary, this old of a dragon can cast at this level, but this same aged different dragon can cast at THAT level.

I am asking, because I am trying to level up some NPC's for a game im running, and dragons CAST at a certain level, but its not specified that they get spells once they hit this age, or they get spells once they hit this many HD, just that they DO cast, and get stronger as they get stronger.

Any help, or really, advise on how to handle their sorcerer spell progression?

[Fomsie]

Well, they are treated as sorcerers, so the power is inherent to their beings. Since there is a sorcerer bloodline descending from dragons, it stands to reason that the draconic blood is just a magical medium.

As for the differences between types of dragons, that has always been the case from the older editions of D&D, there are some that are more powerful than others.

When it comes to dragons, it truly is the most obvious case of "a wizard (or more actually, a dragon) did it", as a valid answer.