The Corruption of Arcane Energy: The Creation of Fel-Knights

Unknowing that Arcane Energy can become overwhelmingly addictive the 
Battle Mages became overcome by their thirst for power. The Arcane 
Energy corrupted them turning them into Fel Knights, battle mages who 
had the ability too use corrupted arcane powers and mix it with the fire
 element creating a green flame. These Fel Knights where ruthless and 
power hungry such as Blood Mages. Fel Knights used Inner Elemental 
Energy causing them too be particularly difficult to control.