User blog comment:Mathmagician/Hard Mode Bosses Solo Walkthrough/@comment-4579023-20111226024647/@comment-4674838-20111226053041

Yes, Clairvoyence. You know, the buff you get when you right-click on a Crystal Ball after purchasing it from the Wizard and placing it on the ground. It lasts for 10 minutes and it's very helpful for mages.