This is an arcane summoning portal for your NPC's demon summoning needs.

Everything was printed at .2mm layer height. The top and bottom pieces can be any filament your heart desires, but for the lighting effect, the "portal" portion will need to be printed in a translucent plastic (or you can forgo this piece altogether and use some other piece of colored plastic you have on hand - a soda bottle, a lighting gel, the side of an old rubbermaid tub, etc).

The bottom and portal pieces print straight on the bed, no problems, with no supports needed. The top ended up needing to be printed face up with supports (I also used a raft, but I think this was overkill). I think it's possible to print this face down with no supports, but my bed adhesion just wan't up to the challenge.

I glued the "portal" piece to the top section, but left the top and bottom separate so I can turn off and on the lights inside.

For lighting, I used this set of lights from Amazon (Govee Fairy Lights): https://www.amazon.com/gp/product/B07HJ54Y3Q/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

I ended up splicing two sets of lights to one battery to help it illuminate better, then taped the lights in a spiral inside the bottom section.

To help diffuse the lighting (if you feel the need to do so), you can lightly sand the bottom of the "portal" section and/or use parchment paper or use thin packing foam (which I did).