User blog comment:Quantumyogi/Custom Champion: Rapid, the Twisted Tinkerer/@comment-18521310-20130923085125/@comment-18521310-20130923092435

Agreed that its drawback is that you can't control when the stun happens unless you have 100% crit chance. But it's a passive that provides a stun, it better have a drawback.

And without some kind of limit on how many times you can proc the stun, it's just broken. Example: even if the stun duration is only 0.5 seconds, all you need to do is build 100% crit chance and a 2.0 attack speed. That's not even that difficult to do, and suddenly any champion you auto-attack is chain-stunned FOREVER. That's beyond powerful. Not even ults are that powerful.