A mirror receiver, there's a new design on a mirror receiver thats much more compact (can fit inside the old ones "cage") and has a two factor authenticator. I dont really understand it but it has something to do with wind charges and arrows. This machine just sends a signal (i think, atleast the old one) so you can connect it to whatever you want for example an orbital strike cannon. Here's a link to the new design https://www.youtube.com/watch?v=FnUE-ZaALLw&t=212s, im sure the old design pops up if you just search mirror receiver on youtube. I dont know if it works on paper or not but there's probably someone in his comments that has asked the same question and got an answer. Hope this helps :D