The brush that I used was only made for Photoshop- I downloaded it back in 2016 and I dont remember where...
However, here is a brush that is in the Clip Studio Assets- go there to find brushes; all you need to do is type in a key word(the word I used is "dust"):
BTW they are free to download. The other dust brush that I have via CSP was free, but has been moved to 10 clippy points...to make the brush "glowy" you create a layer, select & fill the layer with black, change the type of layer to "screen", and then you can pick the brush- pick a color you want to use and change the brush type to "screen" as well; be careful though- the more you use it in a certain area/space, the brighter it gets...