Place something of value or apparent value at the end of the hallway.
Falling floor trap.
Falling net mechanical trap this trap uses a trip wire to release a net suspended from the ceiling.
First and probably the simplest set up a room that is 2 wide with a trapped chest at the end a trapped chest will give off a redstone output when opened so hook it up to a redstone torch to invert the sig.
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Any nosy neighbours will fall to their doom.
This trap can even be effective.
Just build a hole in the floor next to a wall in your house.
It works by creating a concealed safe route through the pitfall which is usually very big to allow authorized players to pass while catching unauthorized players or mobs and killing them.
If you try to make the trap tempting it ll be more likely for it to work.
A good trigger for this trap would be a pressure plate or tripwire.
This trap is best placed in a narrow hallway.
The net is hidden by cobwebs or foliage.
When the party gets halfway down the hallway the floor tilts downward on one end and grease begins covering the floor.
I opted for the latter.
A false floor trap is a variation of a pitfall trap.
Cover it with a trap door and then put a button on the wall next to it.
The trip wire is 3 inches off the ground and stretches between two columns or trees.
Resulting in the target falling to the ground.
Once the trap is triggered the floor of the area is filled with rubble and becomes difficult terrain.
There are a couple ways you can do this.
And if they do we can now turn the tables on them by laying a trap.
The floor of a small medium room is covered in identical stone tiles.
Now trap is all set.
Select about 1 3 of then to be trapped making it in a pattern helps the players out a little bit and makes them feel like they can mentally overcome the obstacle but random placement insures chaos.
For example if it s someone who lives with you pretend to be telling a friend on the phone where you re hiding something that that person likes but is really where the trap is located.
You can make anything you want bottom of hole.