Kryptonite (Drug)

"The black mamba is a tricky beast to tame. With time, patience and lots of blood transfusions, the beast will serve you well."

Kryptonite, or "black mamba", is a liquid drug known for its bright green color, and the black veins that its users develop, leading it to be known as the black mamba.

Effects
Kryptonite increases blood flow to the body each time it is used. The effect increases every time it is used. Eventualy, the brain adapts to the drug and users can move at extremely high speeds. Users describe the feeling as if the gravity were turned off. The speed of the blood will cause an instant death of anyone who recieves the most minor of cuts.

"You won't be fast enough to dodge a bulet, but you will have time for tea between trigger-pulls."

Military Use
Subjecting people to use of kryptonite was declared a violation of human rights, and the practice is banned in all national militaries. It is considered a high-profile narcotic, and taking it is a felony onto itself. It is a popular drug among gang members.