User blog comment:Slashingstrike/Ghostblade based for Crits/@comment-27859592-20161028130847/@comment-15077371-20161029180536

The idea is the item's bleed effect will trigger the shimmer effect to expose stealth units' location

Ezreal and Ashe can also trigger this effect by damaging the enemies with their abilities same when Singed damages Shaco or Twitch with poison when they are stealth he triggers the effect