User blog comment:YourPrivateNightmare/Hail the hourglass!/@comment-6301771-20130915190841

ADCs do not want to be put in stasis. That is antithetical to what an ADC wants in a fight. An ADC works when it can give out a sustained damage output, that is its job. A mage wants to be put in stasis to wait for their cooldowns to finish up. If a mage has bursted and needs a quite reprive to avoid getting counter-bursted, Zhonya's works wonderfully. An ADC will never be in that kind of situation due to their nature as an autoattack based champion. Using a Zhonya's with an attack speed of 2 results in 3 attacks lost and an inability to reposition, two of the most important things for any adc to be doing.

What ADCs need is a defensive item that promotes aggression. Something that operates on a similar function to the likes of Graves' passive.