Here's the whole project created for the Magic Orbs in VFX Graph video tutorial 
 
This package includes:
-10 Magic Orbs (customizable VFX Graphs)
-Highly Customizable (change texture, rate, color, size, radius, etc in the inspector)
-Shaders (scroll and distortion)
-Textures (smoke flipbook, impacts, circles, etc)
-HDRP and URP only
-Limited Mobile support
-Documentation
 
Originally made in URP, adapted to HDRP.
Visual Effect Graph from the Package Manager is required.
Contact me for any questions.
 
Available in Unity 2019.4 and Unity 2020.3 in URP and HDRP.