Conductor Stones
Aura: Faint Conjuration; CL: 6th
Slot: -; Price: 500 gp; Weight: 500 lbs;
Special Notes / Rules: Elemental Binding (air, 2 HD, usually a Small Air Elemental)
Source: ECB, pg. 271
Description:
This stone is merely a Khyber dragonshard with a bound air elemental, set into a heavy metal mounting to prevent it from being easily moved. Individually, they do nothing other than glow with the same intensity as a sunrod, but when two or more are placed close together, a repulsion force can be felt that is so strong that no amount of force can get two Conductor Stones closer than 6 inches apart. It is this repulsion that gets a lightning rail above the stones and gliding effortlessly.
In production, Conductor Stones are usually placed 50 feet apart along the route that a Lightning Rail Engine is supposed to take. A lightning rail can withstand one missing Conductor Stone, moving at half speed, but two or more consecutively will cause a possible crash.
Construction Requirements: Craft Wondrous Item, Bind Elemental, Levitate
Construction Cost: 150 gp; a Khyber dragonshard worth at least 100 gp