User blog comment:LivesByProxy/Shaco - Champion Update - Season 6/@comment-5588011-20150726003230/@comment-26815373-20150726071802

Thanks!

The passive is intended to help 'secure' kills those kills where your opponent(s) would otherwise just barely escape. It also lets Shaco peel effectively, as anyone trying to reach an important team member will be hindered by his other forms of cc, and by the time said opponent realizes he or she will die, they can't help but smile. ;)

I imagine Shaco being the support in many cases, and if it is good with him while he is the weakest member of the team, it should be amazing if triggered by anyone else. But even if you're traditional AD jungle Shaco, your attack speed should still be quick enough to proc it yourself (maybe).

I invision the count down like on Zilean's bombs or Fizz's Ult. Also, the 3 seconds is time to decide what to do, where to be, and whether or not you're going in. It's also time for your opponent to react, should they hear the music. Also, no more insta-gibbing when face-checking a bush.