Horrific Masquerade

Faceless Mask of the Long Night
Complete all five objectives in a single Horrific Vision run.

Faceless Mask of the Burned Bridge
With at least one mask active, complete the Valley of Wisdom objective in Orgrimmar.

Faceless Mask of the Daredevil
With one mask active, complete the Valley of Honor objective in Orgrimmar.

Faceless Mask of the Pained
With one mask active, complete the Old Town objective in Stormwind.

Faceless Mask of Dark Imagination
With one mask active, complete the Mage Quarter objective in Stormwind.

Faceless Mask of Vengeance
With one mask active, loot the mask from the Vengeful Voidspeakers located in the Canals, between the Trade District and Old Town in Stormwind.

Faceless Mask of the Nemesis
With one mask active, defeat both nemesis enemies and loot their Nemesis Shards to fuse the mask:
- In Stormwind, interact with Hogger’s WANTED poster near the Mage Quarter entrance.
- In Orgrimmar, interact with Gamon’s axe on a table in the Broken Tusk inn (Valley of Strength).

Faceless Mask of Multitudes
With at least one mask active, complete all objectives and kill every single enemy in a single Horrific Vision run.

Esinar's comment for the original version of this achievement appears to continue to be valid. I obtained [item=174080] after clearing all areas of the Horrific Vision of Stormwind without masks. I then obtained [item=174081] by clearing only the Mage Tower area, using [item=174080]. I also killed Alleria, but this is probably not required. [item=174081] was contained in the side chest for Mage Tower.

Subsequently, I did a full clear of Stormwind using [item=174081]. I received [item=174079] in a side chest, presumably the one for Old Town.

Managed to got a bug somehow.

I have all 8 masks and yet I dont have any progress for the Mask of Multitudes.
I even managed to get the 8 masks achievement run, and yet it says i only have 7/8 masks ... GM's are no help either.

The slash command to say if i turned the quest for this maks is "false" and because the game say I do have 8 masks unlocked, i'm stuck in a chain loop.