Hash's condition is actually way better, but his father kept him under-recovery status because he doesn't want him to get involved in a hands-on war between the council and the ravens. He's been progressing along with his cousin Luna in perfecting his shape-shifting skill. Maybe even better. So when it's night and when his father was asleep, he tried transforming into the tiniest insect. For the longest time, he tried to be a mosquito but his built and physic couldn't allow it. Until one day, he realized he had to be a swarm of mosquitos.
But it's going to be too obvious, so he transformed into a couple of hummingbirds and flew out the window. The council's headquarters were too modern, nature elements were missing, so he couldn't be a bird. He had no choice but to be a swarm of the tiniest insects that blends on the light and even the dark.