You know what’s scary? Those beaked plague doctor masks.
They seriously could not be more terrifying. I fear plagues – so much so that I will not play the board game Pandemic – but I still might rather die of the plague than deal with a doctor dressed like this.
The PCs HAVE to end up wearing these at some point.
In 4e, I’d stat these as:
level 1 head slot (common)
The wearer of this mask has a +5 item bonus to defenses versus disease.
I’d have some noble give a stack of these to the PCs and then send them on some mission into a plague-wracked city. It would be horrific, especially when they find that the dying plague victims are stumbling towards the market, where their bodies are joining a colossal monster made of plague corpses.