(Planet Dodo, Secret Training Facility, Leo's POV)
Leo did not want to admit it, yet learning how to send an imperceptible wind wave to pop a set of water balloons was turning out to be some of the hardest training he had ever endured in his life, as for days on end, without so much as a proper rest, he and Veyr kept firing pulse after pulse of wind waves over the long water trough, only for the surface to ripple each and every time from the faintest disturbance in the air currents above it.
No matter how much they experimented, no matter how stubbornly they pushed themselves, they simply could not get the execution right, as though the move itself refused to be learned by brute repetition alone.
"It's not about speed or power…." Leo eventually realized, as even when he drove the wind pulse forward faster than the eye could follow or packed it with enough force to shatter wood, it remained detectable all the same.
