The alternating pattern used on these nails is often seen painted on the walls of Athian buildings in the belief that it will grant protection from fire. The speckled black is said to symbolize falling ash. Interestingly, however, the original intent of the design was the opposite—rather than driving back the flames, the user would be granted the power to control them.
When imbued with the power of the Tantas, this design may grant a burning effect to Attack Magic charged beyond a certain level.