A Slumbering Spirit Bloodline?

Marina had taken over a thousand years to achieve her current status as a young adult dragoness.

Azurea, on the other hand, had reached her sister's level and achieved her S-Rank breakthrough in just over 200 years.

This was absolutely insane even by the dragon standards, not just in Labh Salem but across multiple worlds.

By draconic standards, Azurea was still a child. If Marina was considered a teenager among dragons, then Azurea was a mere nursery kid who had managed to match a teenager's level simply by capitalizing on her natural talents. In reality, she didn't even have to rely on precious resources to achieve her level. 

Azurea wasn't someone who liked to brag about her talents. However, she had genuinely never seen anyone younger AND more gifted in the lightning element than herself. Forget about humans, she had never come across any dragon of her own generation who was more talented than her.