A wax stamp with the screw able to fit into the ones I bought from ebay or Wish. Use the blank to add your own design onto the stamp. I'll add more as I make them.

Thanks to bigunwhistle for making the Hogwarts seal, my only edit was to make it fit with the handle.

I melted wax and tried it on some paper, the wax came off with the plastic rather than the paper. So it doesn't work as is.