Woa, woa, got another one!
Teleporters have a chance at sending you into a blank dimension, just an ever expanding featureless field. Using any teleporter inside this dimension will bring you back to the the same place you were when your teleporter malfunctioned, and only a fraction of the time will have passed, say a second for every hour.
With enough skill you could manufacture an enhanced teleporter with an option to go to the featureless field at will.
The enhanced teleporter could be improved even further with mods to connect to modified reflex bionics so as to be triggered whenever you are about to be hit by something - instead of taking damage you teleport to the blank plane.
If could be modded with a tracking device and a portal generator so as to allow you to teleport in a different place than the one you teleported from, but youād need to walk several overland tiles in the blank world for every map tile you want to move in the real world when you teleport back, but it would leave a three way portal in the spot for a few seconds in the real world, so a few hours in the blank world and who knows how long in the ether world, from where a bunch of creatures could pour into the blank world.
The creatures from the ether world would immediatelly begin to colonize the blank world so every portal that you made would generate random patchs of alien mold, flying creatures would sometimes get into the blank world through such portals and cause more portals to randomly pop up as they fly about, and slug like creatures that leave a trail that grows into more alien mold and become structures that spawn more ether slugs when they die.