The Aegis Shield is the dual-layered, spherical, planetary shield which is known to be the most powerful form of protection ever made. It has two layers, inner and outer. It utilizes the power of Vauphine. The concept was proposed by Lyrus Ravenmoore, a global protection field that was near invincible against all evil. To construct it, dispersal mediums called Aegis Substrata, to form a perfect spherical shape, which are located all around Ardatria: one in Niveus Thora, Forenzio, and Erâdis, the last one however is a mystery. Built to withstand any source of evil and unholy presence.
The Aegis Shield collapses on "Light and Shadow VII: The Legend of the Vanguard", Zedrus Arumora finds the hidden location and breached through using The Arnado Quartet embedded in Ravenmoore's Locket for the final Aegis Substratum, and corrupts the flow of Vauphine aura on the contraption, grinding everything to a halt and the interference has caused the last but largest Vulcan Spark and creates further Flames of Dinistrio as it dissipates. This allowed passage for evil to enter Ardatria, leaving the entire world vulnerable to such darkness.