Learning the Infernal spell as a warlock in Classic WoW - Orc Warlock, Arugal

Very predicatable song choice /eyeroll. My warlock got her Infernal at level 60, even though you can pick the quest up at level 50. I had only just dinged, and am still wearing very ordinary gear indeed, but was able to solo it easily at 60. If I'd tried earlier I'm not sure that would have been the case!