Call of Fire (Draenei, 7) is a quest that was marked obsolete by Blizzard and cannot be obtained or completed.
They are called that, but once they were draenei. Fel magics transformed them, and that is why they cannot call upon the power of the Light. Some disapprove of them and the shamanism they teach, but they are not evil.
I wish you to speak with Farseer Nobundo. He is the wisest shaman I know and you will learn much with his guidance.