User blog comment:Ozuar/Kha'Zix - My Conundrum/@comment-1488423-20130410161454/@comment-6435632-20130410190246

His ultimate adds a massive damage reduction on top of multiple stacks of Unseen Threat. Again squishy targets, 4 auto-attacks plus 4 procs of Unseen Threat is basically immediate death, so often you don't even need to use anything besides Void Assault to kill, say, and ADC or Mage; and they won't be able to target you while you're stealthed.

Situational? Yeah, probably. But that's the same with all of his evolutions.