Embargon is a magical potion used to specifically interdict speaking about certain chosen matters – these are specified by the creator of the potion. It is used primarily by the freelance bounty hunter named The Brand, who is sometimes employed to kill certain news stories which the powers that be have decided they do not wish to see come to light.
Injected by darts fired from the nose of The Brand’s dog, Sweet Boy, Embargon is thus applied directly to the bloodstream. It causes death when the forbidden story is spoken of outside of the room where it is applied. Unusually, any speech of the forbidden story on the part of any of those dosed with a particular preparation of it will cause the death of all those dosed with that preparation.