Fel Essence (Suramar)

Fel Essence drops from the following mobs in Suramar:
 * Felsoul Inquisitor
 * Wrathguard Fury
 * Legion Endbringer
 * Shivan Strifebringer
 * Felsoul Crusher
 * Wrathguard Soulsplitter

As a quest objective

 * Power! Get The Power!