I was looking into the music video for clues, found this scene where chamber was being attacked with various agent utils like Brimstone's ult and Phoenix's wall... This was one of them as well... Looks like a water "smoke"... OR maybe some...

I'm not a good player, I'm pretty bad and pretty new, but me (Iron 3) and my (Iron 3 - Bronze 1) friends queue up in ranked to have some fun games and get either stomped by an admitted Gold or higher smurf or by some fortunate chance we hav...