Quote Originally Posted by Berethos View Post
I'll have to double check when I get home from work (unless someone wants to check on their own before then) but I'm reasonably certain that the last major patch changed it to only remove detrimental effects, not put a buff up as well that had the same functionality as before.
Tested, and this one of those moments where I'm wondering how I didn't notice it before.

As ruskie said, it does both - removes a current detrimental effect and adds the shield for 30s that automatically removes the next one. That's actually silly good, in my opinion. I like it, but it's silly good.