User blog comment:GimmeStarfoxWii/Exhaust vs CV for Supports/@comment-3112744-20130409043447

Interesting that I see this right after the very first game I've ever seen Clairvoyance used. I don't think it was that effective, but maybe they weren't using it right - it was on the enemy Soraka, and she was with Draven. With certain champions, I can see where it would be quite beneficial; otherwise it seems wasted. Its mastery upgrade, however, does look like a huge boost.