Telecrystal Lockers

[Wraithcraft]

Another idea: Telekill alloy. An anti weird shit kinda metal. Can't be teleported, telekinetically thrown, possessed, whatever. Containers made of it prevent any form of signal from reaching items inside, which I'm sure could be used to make some cool traps. Wear a hat made of it to stop people from reading your mind. Armour made of it stops Wraith, wizard and vampire powers from targeting you, similar to the chaplain. Make walls of it around the AI core to stop wizards from phasing in there.

Maybe an alloy with that weird eldritch metal, Koshmarite.  

Downside? Horribly radioactive, and causes brain damage to everyone near it.

I see your SCP Ideas, nerd.