This quest is not available in game.
Magus Zabraxis at Honor Hold wants you to bring her a Fel Ember.
The stuffy academics of Azeroth have cowered in their towers for too long and it's fallen to me to show them what cutting edge research is! They're afraid to play with fire and that's exactly what I intend to do, once I get my hands on the fire, that is.
Within Hellfire Citadel's Shattered Halls, Grand Warlock Nethekurse performs unrivaled magical feats augmented by the powers of a pair of strange braziers. Using the vessel he uses to contain these fel embers, capture one and bring it back to me, <name>.