Airblade
Before I built audio systems I was a Yasuo one-trick, and I theory-crafted him the same way I work now. Two things came out of it: a build that got the game patched, and a tech that didn't exist as a Yasuo trick until I found it. Both came from refusing to play him the way you were supposed to.
Frozen Force: the time I broke the game
Everyone built crit Yasuo, for a good reason: his passive doubles his crit chance, so crit is what the champion is "for". I built zero crit on purpose. In this one case the trade-off flips. Trinity Force already makes Yasuo absurdly fast and hits hard, and Frozen Mallet means whatever you jump on can't run. A tanky mosquito stapled to an item that deletes the enemy's escape is miserable to play against. I called it Frozen Force, Frozen Mallet plus Trinity Force.
It worked too well. Zero-crit bruiser and tank Yasuo climbed to the top of the winrate charts, got labelled unhealthy, and Riot patched it out: in August 2016 they restricted Yasuo's ultimate armor penetration to critical strikes only, so a build with no crit lost the steroid entirely. Getting your own build rewritten out of the champion is about the most flattering thing that can happen to a theory-craft.
Airblade: the trick that didn't exist yet
Airblade is a Yasuo combo: you precast your E-Q a fraction before your ultimate, and the spinning Q follows you through the ult's teleport, landing its AoE and a tornado stack mid-ult. Done right it chains three knock-ups in about four seconds, which should not be possible.
I remember the exact moment. I was holding a tornado while an Alistar combo'd an enemy Leblanc on mid, didn't want the tornado wasted, and tried to fire it before ulting onto the Alistar knock-up. There wasn't time, but as the ult went off I saw the tornado cast from where I landed. Unusual. Sandbox mode didn't exist yet, so I dragged a friend into a custom game to replicate it, got it again, then tried it on a normal E-Q cast. That was the one that broke my brain. You could precast the whole combo onto the ult.
I recorded it, posted it, named it. It wasn't known as a Yasuo trick before that.
Naming the family
The names all hang off Yasuo's E, Sweeping Blade. Beyblade came first, named by one of my mods, partly because in French "l'EQ flash" was a mouthful and the move was fast and flashy. Around then Redmercy coined "Quick Nado" for the same thing. When I found the airborne version I named it Airblade, for the air and because "Air" and "R" sound the same in French, so the name pointed straight at the ultimate. "Arkblade" was on the table, it even flashes up in the old video, but Airblade was too good to pass on.
The anticlimax
I posted Airblade braced for it to change how people played the champion, and Yasuo got disabled from the game a day later for a completely unrelated bug. Perfect timing. The trick survived anyway, the name stuck, and people still argue about who found it. I did.
Draft, your voice goes over it. To pin: the exact Frozen Force era and whether your build was the one nerfed or the precursor that fed the tank-Yasuo meta; the Airblade mechanic phrasing (I compressed it, check it reads true to a Yasuo player); and any receipts worth adding (rank or winrate on Frozen Force, the montage virality, the community reaction). The Keyblade naming and the full lineage are left out for pace, add them back if you want the deep cut. Media: the embedded video is the original Airblade clip, swap if you have a cleaner one, and the patch notes screenshot would make the Frozen Force receipt visual.