Krokodil.
Many more times powerful than heroin, it has a bonus feature- it rots the flesh from the bodies of its victims while they are still alive.
http://www.independent.co.uk/news/world/europe/krokodil-the-drug-that-eats-junkies-2300787.html
Many more times powerful than heroin, it has a bonus feature- it rots the flesh from the bodies of its victims while they are still alive.
http://www.independent.co.uk/news/world/europe/krokodil-the-drug-that-eats-junkies-2300787.html