The Ley Lines are ancient veins of primordial energy that run under the earth across the entirety of Hazeron. Much of the knowledge surrounding the ley lines has been either lost to time or simple never discovered, but it is indisputable that the lines have a powerful influence on the world at large.
Large and ancient trees that grow out of ley line deposits are often referred to as "ley connected", and often possess unique properties.
The wizard Selathwin Muleyr is interested in the powers and properties of ley lines, and is actively researching them.