How are the designs in the visual made and is there anyone who does them?

Did you make progress on the issue? 

For the marbling effect, find or make an image with the colours you want to use, and go mad with the Liquify tool

The lava shield is going to be more difficult

Quick and dirt to show the method.

Find an iomage of some bright red lava

Paste/load it into Photoshop.

Make a new layer and use Filter > Render > Clouds

Turn that layer off. Ctrl click it to load it as a selection, and add a layer mask to the lava layer

Modify the layer mask to give the effect you need.  You can use Liquify again, or select suitable brushes.

Note: If you Alt click the layer mask, the mask will fill the document window making it easier to modify.

Use the elliptical marquee tool to select a circle (hold down Shift) and add a layer mask.

Clip the shield layer to the lava layer

I'm sorry, I am rushing this, and you may have to work some of it out.

I selected the lava and shield layers and made them a Smart Object, and used Layer Style > Bevel & Emboss to give some depth.