While watching a video link this morning on working with demons I was pondering that Kickstarter and the Goetia coins (it’ll be a while before I get mine but I will post pics when I get them… yes they will be part of my divination tools and more).
Anyway, an artifact idea came to me. This could be quite a large brass vessel with rare earth magnetic core inside. The construction on the inside is free moving with possible receptors of some sort (maybe produces electric sparks or current when the receptors on the free floating core move… dunno).
Another option is just a rare spherical earth magnet covered entirely in brass. Failing that, lead core or stainless steel covered in thick brass.
The brass is etched with each of the 72 Goetia seals connected in some order around the sphere. That’s a lot of seals and a lot of work but I’ve seen etchings done quite small and perhaps this could be done easily on a 3D printer. The grooves of the seals need to be just a little deep but easy to clean. So a goetic sphere of sorts.