She would no more age once per year from now on, which was an elf's perk. And it's already been nine years, and she was now a Higher Deity, two more ranks before finally becoming a Mortal Demigod.
But she did not start cultivating Mana until a year before Enigma left, which was six years ago. It was also the same time when he gave everyone Supreme talents, which was why she was able to reach this far in just six years.
Ordinarily, it would take even a Millenia Genius forty years to reach her rank from being nothing. Anyway, that aside, not only her, her six other sisters were also Higher Deities, and also Head Priestesses of the Temple of Enigma.
It's also been an era of battles within the World Forest. And with Nia, being a year away from becoming a Deity King, the Providence of the place had suddenly increased, making the place as bright as a star in the Void.