Necropolis Portal terrain piece

A little portal I created for tabletop gaming. The insert part should be printed in a (preferably green or limegreen) transparent fillament. it can be either one portal inserted, two or three. You can also cut some acrylics to fit in instead or leave it without it and it will act as if it's offline.

EDIT:
After printing I managed to print the portal in transparent PETG. I managed to print it with 0% infill but you need to put it on one of it's sloped sides on the... uh... side.