Steel Serpent

"Yeah, I've seen this around all over the city. Heroin, pure like you've never seen... call it "Steel Serpent" on the streets."

- Ben Urich to Daredevil

"Steel Serpent" is a kind of produced and sold by Madame Gao's blind "employees".

History
To be added.

Trivia

 * In the comics the "Steel Serpent" is not a drug, but a character, one of the major villains of Iron Fist.