Fel - ultimate manifestation of the demonic arcane. Fiend – 1) a person of great wickedness or maliciousness; 2) a person extremely devoted to a pursuit or study. Mortals who embraced the demons and gave themselves over to the arcane achieved gifts of power while the Burning Legion was at its height. When the demons fell in the Third War, the mortals were stripped of this power--they now suffer withdrawal, and a fierce desire to regain the lost power. For every Fel Fiend a sword-wielding hero backs into a corner, two fiends lurk in the shadows, waiting to backstab and poison her.