Intel Xeon Ω
The Destroyer
If you use it when there is natural background walls, it won't work (it won't remove anything) but if you go to an area that has no walls or an area with something like Planked walls, it'll function just fine. No other hammer seems to do this. It works fine on artificial walls, and you can transition from artficial walls to natural walls without an issue. The dungeon doesn't really seem to be affected.