Gedankenschlürfer

While you adventure in Azj-Kahet you'll probably spot a Memory Cache treasure in The Maddening Deep area that won't allow any immediate interaction when you arrive. You'll need to interact with a Extractor Storage nearby to get the Unseeming Shift aura to see the hostile Corrupted Memory close to the treasure. When you defeat the memory, it will drop a Cache Key and this allows the interaction with the Memory Cache. Open it and grab your Mind Slurp.

When you have the pet summoned, it will randomly put a 5-minute Mind Slurped buff on you that adds a purple tint to your whole character and changes your running into a zombie walk. (Unfortunately, that is not yet working on all races. e.g. Tauren and Pandaren just walk fast instead of running.)