What does Yasuo's Wind Wall not block?

There are some Exceptions for the wind wall. Some of them are (most likely) bugs and others are projectiles that don't dissapear but just can't pass the wall.

List. Spells/auto attacks that are blocked are BOLD you can assume the rest is not blocked. If there is as spell with special behaviour I will point this out. The list would be too long if i counted every spell that doesn't get blocked.

Champions where no spell/AA can be blocked are ITALIC

• Aatrox E
• Ahri Everything (R damage only)
• Akali Q
• Alistar none
• Anivia Q, AA, E
• Annie Q, AA
• Ashe AA, W, E, R
• Amumu Q
• Blitz Q
• Brand Q,E (if cast on ablaze target), R, AA
• Caitlyn AA, Q, E, R
• Cassiopia E, AA
• Chogath E (passive)
• Corki Q, R, AA
• Diana Q, W
• Darius none
• Mundo Q
• Draven Everything
• Elise Q, E, AA (Human form)
• Evelynn Q
• Ezreal everything (E damage only)
• Fiddlesticks E, AA
• Fiora none
• Fizz R (Fish won't dissapear, it just can't move through the wall)
• Galio Q, W
• Gankplank Q
• Garen none
• Gragas Q, R
• Graves Q, W, R (Projectile only, not cone), AA
• Hecarim none
• Heimerdinger AA, Q (AA), Turret (passive), W, E
• Irelia R
• Janna AA, Q, W
• Jarvan none (Q is ranged but it's a meele weapon)
• Jayce, AA(cannon stance), Q
• Jinx AA, W, E, R
• Karma Q, AA
• Karthus AA
• Kassadin Q
• Katarina Q, R
• Kayle Q, (AA are no projectiles, so they won't get blocked)
• Kennen AA, Q
• Khazix W
• Kog Maw Q, AA, E
• LeBlanc Q, E AA
• Lee Sin Q (Sonic Wave only), E(Cripple only)
• Leona E
• Lissandra Q, E, AA
• Lucian W, R, AA
• Lulu Q, W, AA, Passive
• Lux Q, W, E, AA
• Malphite Q
• Malzahar AA, Q
• Maokai Q, E (doesn't get destroyed but can't pass the wall)
• Master Yi none
• Miss Fortune AA, Q, R
• Morgana Q, AA
• Nami Q, E, R, AA
• Natilus Q, E (R not blocked. Maybe a bug)
• Nidalee Q, AA
• Nocturne Q
• Nunu E
• Olaf Q (stops moving when it hits the wall)
• Orianna AA, Q, E (the ball can't pass the wall and shield won't happen)
• Pantheon Q
• Poppy none
• Quinn Q, AA
• Rammus none
• Rengar E
• Renekton none
• Riven R
• Rumble E
• Ryze AA, Q, E
• Sejuani R
• Shaco E, W(AA)
• Shen Q
• Shyvanna E
• Singed none (Don't know if W is a bug because you can see the liquid mid air)
• Sion Q
• Sivir Q (will bounce back to Sivir), W, AA
• Skarner E
• Sona everything
• Soraka AA
• Swain E, R, AA
• Syndra R AA (Strangely E isn't blocked both orb and knockback. Maybe also a bug)
• Talon W, R
• Taric E
• Teemo AA, Q
• Thresh Q, W, E (His AA are connected to him and are no projectiles)
• Tristana E, R, AA
• Trundle none
• Tryndamere none
• Twisted Fate AA, Q, W
• Twitch AA, W, R
• Urgot AA, Q, E
• Undyr none
• Varus AA, Q, E, R
• Vayne AA, E
• Veigar Q, R, AA
• Vel'Koz Q, W, E (his auto attacks aren't considered projectiles
• Vi none
• Viktor Q (shield gets denied!), E, R (still moveable but DOT gets blocked), AA
• Vladimir AA, Q (Heal only. Damage still works), E
• Volibear none
• Wukong none
• Xin Zhao none
• Xerath AA, E
• Yasuo: Q, W(2 Windwalls will negate eachother)
• Yorick none
• Zac none
• Zed Q, W (Shadow stops at the wall)
• Ziggs Q, W, E, R (only when the bomb is visible so at start and end), AA
• Zilian AA
• Zyra AA, Range Plant AA, Passive, E

For Items or special things Here's another list of things that get blocked:

• Caster minion AA
• Baron Nashor AA
• Dragon AA
• Deathfire Grasp
• Blade of the Ruined King
• Blackfire Torch
• Bilgewater Cutlass
• Mikael's Crucible
• Spoils of war (Shield lasthitting projectile)

Things that aren't blocked but still are projectiles somehow:

• Turret Hits
• Fountain Turrets
• Vilemaws Net attack

I'm pretty sure this list is accurate BUT there can be some mistakes after writing for 1 hour ;)

From lol wiki:

The wall blocks all enemy projectiles, except tower hits

This means anything that is a projectile including ults (even ziggs ult, because the bomb is actually flying over the map to the place where it lands).

Dashes are no projectiles, so they go through. Dashes are, if at all, blocked by terrain and the wind wall is no terrain. It does for example block Ashe ulties, like any other skillshot I have seen so far (since they are projectiles), even if they go through terrain. It also blocks targeted projectiles like Kayle's slow. I suppose it would block a movement ability, if it were initiated by a projectile, kind of like Lissandra's, though I'm not sure the claw actually counts as a projectile. Imagine some new champion had a skill shot, that shot a projectile and wherever that projectile landed, the champion would dash there. The wind wall would probably cause that champion to dash to it that way. I think Leona's Zenith Blade does get blocked and she doesn't dash.

Yasuo's twice-charged Q gets blocked by the wind wall, I'm not certain about the previous uncharged Qs. They'll probably get blocked, but doing that is nigh-impossible: The cast time is so short, you need to deduct from his behaviour that he's going to use it and cast the wall in advance. But then the problem is that Yasuo needs to get fairly close for his Q, so if you cast the wall in advance, the wall has gone past him by the time he finishes casting it. The wall can block projectiles all the way from it's spawn, not just when it's at full strength and distance, so if you get very lucky with your timing, you might hit it just right.

His wind wall does block Ahri's Foxfire as well as her Q. If it touches the wall on the way out, it's destroyed right there and won't return (Afaik. so far all Ahri Qs were always blocked right in front of them, so I'm not sure if they actually returned, but it didn't seem like it.)

Does anybody know, if the wall could block the lightning from items like the Statikk Shiv?