Serious WOW! Hit the top surface with a light sanding, and the tendrils will glow like eruptions on the surface of the sun. There are images of the sun using filters that emphasize the magnetic fields; this is what yours looks like.
Also, if you try this in acrylic, look up “defocus” as a topic and you will find lots of good info. The engraving hill-valley effect that’s easily seen in acrylic can be overcome with a little tweaking. Here’s a link for making an engrave tool.