In folk magic, lightning struck wood holds a powerful significance, revered for its
believed connection to celestial energies and the power of lightning itself. Known by various names such as, "Fired Wood" or "Thunder Wood," lightning struck wood refers to trees or wooden objects struck by lightning. This natural occurrence transforms the wood, imparting unique characteristics that are immensely valued within certain folk beliefs and practices.
The temperature of
lightning is around 30,000 degrees C or six times as hot as the surface of the Sun. It is believed that sap is one reason trees are common targets for lightening because sap is a better conductor of electricity than air. When lightning strikes a tree, the energy is discharged through the tree turning the sap into steam, which causes the bark to split apart.
Different cultures have different beliefs about trees that have been struck by lightning. According to Navajo beliefs, for example, it is not wise to burn lightning struck wood as a source of wood burning fuel as it can cause illness and bad luck. Lightning struck wood is considered the property of the Spirit of Lightning and so it is avoided.
In Chinese folklore, a special divination system called lingqijing uses lightning struck wood as the material from which to make the divinatory objects. The word lingqijing consists of three characters – ling means 'magic' or 'spirit' or 'supernatural', while jing is simply 'book' or 'classic'. Traditionally, the disks are made from wood taken from a tree that
has been struck by lightning and prepared over a 60-day cycle in a rather involved ritualistic process, with the characters being inscribed with a cutting tool and then filled with red pigment. Lightning-struck wood would indeed be ideal, since lightning is powerfully yang and wood is powerfully yin, and in Chinese mysticism lightning-struck wood is regarded as good for expelling ghosts and malevolent spirits.