The chance of finding a good yasuo...

(EDIT- A GOOD YASUO ON YOUR TEAM SHOULD HAVE BEEN THE TITLE, MY BAD FORGIVE ME)

Is the same as finding one of these

https://img.pokemondb.net/sprites/x-y/shiny/thundurus-incarnate.png

At first, it looks normal, then you lose it, then you miss it.

And they are just as rare