On the map
Silithus- not on the map
Progress
You've truly exceeded all my expectations, <name>. You've been taking on opponents that Huum and I would think long and hard before engaging.
At this point the best I can do is to continue rewarding your efforts in the fight against the Twilight's Hammer and their overlords.
Bring me more abyssal scepters and I'll do my best to give you a suitable reward.
Completion
I knew you'd come through, <name>! Here's your reward.