Making a DX 11 explosion

Hello, i would like to make a explosion seen in the butterfly demo that unity made. how can i make a explosion like there’s?

I don’t know this explosion, but have you look at this: http://variancetheory.com/detonator/ ?
Maybe is an option.

Here is a thread according to the tech video from unity. Looks like it is all about the shader.

May be it will help you.