If you are having trouble seeing this NPC even though the skull marker is on your map, check to see if the Brew Bandits world quest is up. Finish that world quest first, and you should be able to see the Felbringer.
Rare Elite
Felbringer Xar'thok
Felbringer Xar'thok is a Rare Elite Demon, level 45, hostile to players.
Details
Felbringer Xar'thok at a Glance
What does Felbringer Xar'thok do?
Level and Map Tracking
The game data tunes Felbringer Xar'thok for level 45, Legion content.
The map marks it with vignette 1,847, which the client hides once hidden tracking quest 46099 is complete. In game, /run print(C_QuestLog.IsQuestFlaggedCompleted(46099)) prints true when that quest is flagged for your character.
In the Client Files
3D Model
First-party render from the game files. Model © Blizzard Entertainment.
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