It can be both. Like anything in nature, really.
It’s like a cute little creek that provides nourishment for the local flora and fauna vs a destructive flood that swamps the environment and chokes the life out of it.
That’s how I rationalize it personally, but I think it makes sense with the whole dualism balance thing Blizzard’s been pushing lately.
I think it’s reasonable to assume it’s innate. When K’ara fell to the Void during the crash of the Genedar, Velen stepped in to shield the other Naaru and to cast K’ara out and that sapped his physical and mental strength so badly that his visions of the future became unreliable for centuries. Seems odd to me that that would happen if the power came from an external source like the Eye of Prophecy.
I’ve an odd question.
Theoretically, would a dragon in humanoid form be able to wield the Light, or be granted powers by Elune? Was inspired by Krasus, being a red, but able to wield the arcane.