If you never open up the door in the Undead Settlement, no phantom will be able to get through it. This accidental discovery led to a potential trap idea. Not shown are the 4 hours of reds losing their way and Blue Bros just standing there for 10 minutes before leaving.
“Jaunty Gumption” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/