Magik is slippery and dangerous to work with, and failure can have disastrous results. Yet the Sorcerer's continue to ply their art without the benfit of the engines and machines now widely recognized as essential to the making of magik.
A slow, stupid creature that crawls onto people and latches onto them, often on feet, hands, and other extremities, numbing down the area and slowly feeding on it. It's easy to avoid while awake, but nearly impossible to remove once attached. Many an adventurer has been forced to hack off an arm or leg after waking with a Stoneleech wrapped around it. Sleep with one eye open! (This idea came from "Wizard's Rule")