Ziran

Ziran or Bloodfast was a magical drug made from a number of subterranean fungi. The drow were the first producers.

Description
It was eaten as either as a white powder or as a tablet.

Uses
upon ingestion, ziran made one lose the full mental and physical capabilities for a very short time counted in a few seconds. After about a minute after the initial effect kicked in, Ziran heightened the base agility and reflexes of its user for a time counted in hours, at least one.

After the aforementioned boost ended, the user experienced themselves as though they were looking at themselves from a distance, this wasn't a safe state. The users' bodies did suffer real physical damage, though not of irrecoverable nature.

Overdosing with Ziran was easy. When a person took two doses in during the same day, they suffered physical damage, but also "benefits". While the physical strain Ziran caused its users was one that enough rest ensured recovery from, overdosing too often could lead to death.

Ziran was highly addictive. Addicts felt the need to take it at a frequency of at least once every two days or so. Withdrawal symptoms included temporary decreased agility and perception abilities but also damaged health.

Users
The drug was known to the drow and was distributed among the military, for example among those of House Jaelre. Valas Jaelre, second cousin to Jezz the Lame was a known producer of Ziran. alongside Kammarth.

Knowledge about its production method spread to the surface at some point prior to the 14th century DR. Alchemists there stated then to organize plantations of the required fungi.