It's been bringing people from all worlds and timelines for years, although only recently discovered a year ago underneath the field where Newcomers appear.

There had been an attempt to record data from it, but that attempt backfired. [It's been a really long time. He can't remember what happened exactly.] So now it's under government control.

No one knows yet what is truly is or what it can do. If it has any sentience or whether it's just a malfunction. There's not much that can be done to test it at the moment.