Elvish priestess is the only elf permitted to study the dark arts, with the express purpose of protecting against it. This knowledge can leave deep scars, so it's not for the faint of heart. However their existence is paramount in keeping the balance and stopping any corruption from spreading. Each priestess has to follow her inner calling where ever it takes them. Very few have turned evil, but it's incredibly rare as the priestess has to show great skill at empathy and healing skills before even considering initiation, which takes several decades. Each Priestess has to master one element, but many choose at least two- one being earth as it's the most versatile for healing properties.