Deadly and dangerous, Nightmare is a drug that, as the name suggests, causes nightmares in the user. Perhaps more disturbingly, it implants pre-recorded nightmares in them.
Found only in Al Amarja, Nightmare is made from the excretions of tulpas – dream entities that have managed to acheive a physical existence in the mundane world. Pushers of the drug, known as Sandmen, gather this dung, and record the nightmares of potent dreamers by smearing it on their foreheads while they sleep.
The dung is then collected, and processed into an injectable serum, and sold to the rich and jaded whose capacity to experience strong emotions has atrophied.