Essence
An abstract influence that manifested after the Nightmare landed in the world. Without the Nightmares, Essences might've not been born.
It is a power that naturally went from the first until today's generation of this time and age. It wasn't widely used until the Nightmare Potions became so popular since it needed most of the abilities some sort of activation and essences were the right fit for it.
Essences, on the other hand, have been studied and researched. Certain aspects of this topic made everyone put their focus on it, and one of them is highly usable for almost every artifact. This, however, was the only common knowledge that everyone who studied Nightmare knew.
