I think that would be a great addition in the marksmen update.
This would be some sort of Attack Speed + 2.5 second invulnerability + 90-120 second cooldown sort of thing (whatever zhonya's is), it needs to set you off your main build path, and it can't be viable on everything, and make it a unique passive with zhonya's so champions like Diana can't have 5 seconds invulernability.
Jetridder113 votesADC's have qss. That's the difference. Mages do not.
Mister Mackey2 votes
?
LegacyDAP1 votesI mean yes kind of, but you can't have it every game. Plus most Bards are just terrible.
Crett1 votes
Solo Josh1 votes[deleted]
LegacyDAP1 votesNearly every mage takes Zhonya's don't even say that only some mages use it, because that's not even remotely true, nearly every mage and assassin takes it, because it provides invulnerability.
IgsabBTGk01 votesNearly every mage takes Zhonya's don't even say that only some mages use it, because that's not even remotely true, nearly every mage and assassin takes it, because it provides invulnerability.
That's not really proof that Zhonya's is a great item as much as it is proof that mages are in a terrible position atm.
SorryBoysImLes1 votesThere are some mages designed for close quarters combat, like Kennen, Morgana, Karthus, and Swain. Zhonyas is there so they can have their playstyle and not feel like they are being punished for it. When you play an ADC, you're pretty much a back lines guy trying to snipe people down and stay out of the mix. I can't think of any bottom lane marksmen that thrive in close combat.
DrCyanide1 votesThe AD Equivalent of 
is 
If you make an AD Zhonyas, then there needs to be an AP QSS-based item.
LegacyDAP1 votesThat's fine with me. Mercurial scimitar is garbage is stops 1 CC or debuff and then you get killed again.
67chrome1 votesI think that would be a great addition in the marksmen update.
Ehh
Giving the same unique passive to everyone runs into issue where build paths stop mattering and defining champions as much, and everyone becomes an amalgamation of unrelated stats that have no clear strength, weakness, or identity.
With keeping things like Life Steal only viable on auto-attackers and Stasis only available to AP you create a distinct feel for each build path. With AD you have life steal to sustain long enough to deal sustained damage as a defining play-style feature, where with AP you have a burst of defense between bursts as a defining play-style feature.
This is further reinforced within build paths where certain stats are only tied to a specific partner stat - such as MR and HP/5, life steal and AD, armor penetration and AD, and so forth. This creates defining choices where armor-heavy builds don't get a high level of HP/5 and life-steal heavy builds don't get much in the way of armor penetration, leading to a lot of decision points with A OR B.
Specifically limiting Stasis to AP itemization alone enforces certain weaknesses on various champion archetypes, it crease a clear OR point which is vital for choice to matter - which it really should in a game with 100+ item choices that aren't simply set up in a tiered format of Iron armor, Steel armor, Mithril armor, etc.
Making an AD zhonya's item runs into a major issue where you cause itemization to be more of a muddled brown rather than a clear red, yellow, green, blue, black, white kind of dynamic.
Chuck Charles1 votesnothing stopping you from building zhonyas on an ADC as a defensive item. its usually a terrible idea, but situationally I've built it on an adc and its saved my ass. Against rengar for example it is not a bad idea. A champion like Ashe, Ezreal, or any of the ADCs with decent ap ratios (tristana even) can make use of it even if its not ideal as a defensive item. If you need stasis for that game you can build it. but generally as an adc if you need stasis its because something is able to catch you completely off guard like Rengar, twitch, shaco, evelyn, etc. or you need to zhonyas a veigar ult, syndra ult, etc.
While its not because marksman "dont need stasis" like some have said in this thread. marksman like any carry need items that help them peel for themselves. I feel the reason mages get it and marskman don't is because a lot of mages have to position themselves in the middle of a team fight and this is there one way of helping their all in. Katarina, twisted fate, diana, etc. all go balls deep and the zhonyas helps their team follow up their engage while the enemy team cannot focus them.
Marksman on the other hand prefer to position themsleves as safely as possible and should almost never jump in unless on an organized team and they KNOW they are going to get peel/shields/heals/etc. Because marksman aren't encouraged to dive in, they don't really need stasis as badlly. Like I said, if you NEED it, you can situationally still build it and it isn't the worst buy.
A lot of people want all marksman defensive items to have offensive capabilities to fit their identity. 
but situationally regular defensive items are well...a good idea. keep in mind your defensive item even the ones who provide offensive stats are only bought to keep you alive. If you were only building for more offense you would just build a second 
or 
. But you usually need a defensive item to stay alive. And people forget you can buy 
and yes even
Mecha MaIphite1 votesthey already do
it just comes in the form of a bunch of fat tanks that bodyblock everything you try to do
and other mages get caught it's fine.
and 
and 
a Zhonya's