There's Something Going On In Those Caves

The horde counterpart to this quest is Stop the Plague.

Objectives
Bixie Wrenchshanker, skulking just to the south of The Dens of Dying, has asked you to use Bixie's Inhibiting Powder at a Den of Dying Plague Cauldron to neutralize it.
 * Plague Cauldron Neutralized

Description
So, while you were out taking care of those plagued beasts, I took a peek inside the caves up there.

There are cultists in there plaguing them!

They have some sort of noxious concoction brewing in a cauldron. I have a powder that I normally use as an anti-poison, and I mixed it up with some other stuff. I think it'll neutralize their brew!

Take it up to one of those caves and see if it works.

Progress
Time's wasting,. The last thing we need is to have to face plagued magnataur.

The normal ones are bad enough as it is!

Completion
I knew you had it in you. Now there's something else that I need to ask you to take care of.

Rewards
You will be allowed to choose one of these rewards: You will also gain:
 * Sweltering Handwraps
 * Rhinohide Mask
 * Plainhunter's Waistband
 * Chilled Shoulderplates
 * 20,100 XP
 * +250 reputation with Valiance Expedition
 * +250 reputation with Valiance Expedition