Go to the Writhing Haunt in Western Plaguelands to locate and defeat the Cauldron Lord present there, and use its key to gain access to the cauldron. You must have the Empty Writhing Haunt Bottle with you to secure a sample of the poisons used inside the cauldron.
Two cauldrons have been successfully opened; while you'll be able to access them indefinitely, we still want to open up the other two that remain. This will provide all of us with more options to introduce the counter agent!
This time, you'll be hitting the Writhing Haunt's cauldron. It is almost due east of Andorhal, relatively close to the ruined city walls; again, eliminate the cauldron lord present there for its key. Use this bottle to obtain the sample from the cauldron.
The cauldron lord's key unlocks the access panel to this cauldron and then disappears, much like the other keys have for the previous ones you've dealt of. A putrid smelling substance churns violently beneath the platform of the cauldron.
There is a small spigot that the bottle fits well enough under, allowing you to draw a sample for Shadow Priestess Vandis back at the Bulwark.
The Wowhead Client is a little application we use to keep our database up to date, and to provide you with some nifty extra functionality on the website!
It serves 2 main purposes:
You can also use it to keep track of your completed quests, recipes, mounts, companion pets, and titles!
So, what are you waiting for? Download the client and get started.