Last breath was the wind technique that Yasuo used to turn the tide of battle on the day he abandoned his post by the Elder’s side.
Last breath is also the reason why Yasuo was accused of murdering the Elder. The students and masters at the School of wind saw first hand the devastation that the technique brought to its target, and the corpse of the Elder displayed the same results of training dummies and logs that Yasuo practiced the technique on while learning it.
There are three parts to last breath. The displacement, the suspension, then the execution.
The displacement is the first part. Yasuo’s target must be airborne for him to move onto the next step. Then why is this part called displacement? And not simply airborne?
His target can’t simply be jumping from a certain height, or even jumping from ground level. They must be thrown into the air by an unnatural event, most likely Yasuo’s gatheirng storm technique of throwing forth that powerful twister, which tosses those in the way into the air. But, this displacement can come from other sources as well, such as Taliyah’s abilties that was shown in the Bird and the Branch short story, or Lee Sin’s roundhouse kick. It’s limiting Yasuo’s ability by limiting him from destroying someone who simply jumped into the air, but gives him some versatility if he’s with allies who can displace someone in the air.
The reason for the displacement leads into the next step, the suspension. Wind wishes to be uncontrolled, it wishes to be free and its own master. This makes it impossible for Yasuo to control every wind current at all times. A displacement is disturbed air that is easier to manipulate. For example, if Yasuo’s gathering storm tosses an enemy into the air, that person is already surronded by currents of wind that is under Yasuo’s control, so he can use that displaced wind to hold, or suspend his target in the air. They’d feel a tight grip on their bodies, restricing major movement of their limbs and torsos.
Displacement and suspension can be described as follows if it was hard to follow: Stage 1: is being thrown off balance, whether it be by Yasuo’s own doing or another form of unnatural knock-up. Stage 2: is Yasuo’s suspension, an updraft of wind that is a result of being thrown off balance initially. His target isn’t under control of themselves, but under the control of the wind. (THANK YOU OCEAN.)
The final step is the execution. There’s a smaller step within this one, though, which describes Yasuo’s journey from the ground to the suspended target. In-game, he simply blinks to them and starts dicing his enemies up. My writing of Yasuo is a different method.
Yasuo’s jump into the air is similar to his windwall. When Yasuo slices his sword into the ground then funnels currents of air to blow upwards and create that wall, he uses a similar technique to throw himself into the air.
This method, Lift, is flexible and can be completed in multiple ways. The technique that gives Yasuo the most airtime looks similar to Rakkan’s W. Yasuo drags the point of his sword in a circle around him, digging into the ground and carving that shape, then a rush of air propels him into the air from the circle.
It’d be difficult in the heat of battle to stand still and draw that circle, especially to keep his FLOW in combat going with potentially multiple enemies, so he can perform this lift in stride as well. This technique doesn’t launch him as high as the previous one, but it does give him a considerable lift. Yasuo can simply drive his sword into the ground and then pull it back, (Much like a pole-vaulter), and a smaller propulsion of wind gushes forth from the hole he created to launch him. He can also drag his sword along the ground as it trails behind him to create a thin scar across the ground that lifts him as well.
This technique is incredibly versatile and gives Yasuo a great amount of mobility.
Once Yasuo is in the air, the more brutal part of the execution takes place. Stronger enemies can try to fight back while being suspended, but weaker ones are completely at Yasuo’s mercy. His sword, during last breath, is fully tempered by the power of the wind. His strikes are unstoppable, shearing through flesh and bone and slamming both himself and his target back down to the ground with incredible force, with the full untethered force of the wind behind him.