Talk:Clairvoyance/@comment-5955640-20131118001410/@comment-26186030-20150522163729

It's not an item, it's a summoner spell. Most people never take it because there are so many summoner spells that can be more useful (tp, flash, ignite, exhaust, smite, etc.) that almost no one uses it. Besides, if you use it to line up a global ult you're just telling your opponent that you're firing it there, giving them time to dodge.