Rock Oil

Rock Oil is a base alchemy reagent.

A thick flammable liquid that seeps out of fissures in the ground. It is believed that when the underworld comes close to the surface, its fiery rivers make springs ooze rock oil and gas instead of clean water. There are many who would experiment with such dark materials, and thus there are many who would risk their lives to gather it and sell at a profit.

Uses

 * base reagent for Liquid Fire
 * Starting ancient machinery