Resonance

 is a supernatural phenomenon that occurs when a sentient kinetic soul, such as a conduit or Gladius, interacts with the psychic impressions it left behind. Such examples are when a Gladius resonates with a certain area or person with which it holds a deep resentment towards and it emanates a terrible sound, such as a cry or a scream. A can be used to either reveal the truth behind a vision or as a trial for Knighthood or Rank of Mastery.

Notable occurrences of s include the resonance between the Spathízo̱í̱ of Dominic Everest and the ruins of Dinas Amgáu, which took the form of the cries and screams of mercy from the civillians that Dominic, as Zwarst Bezaleel, ruthlessly massacred. Head Master Shahar helped teach Joseph to use it to learn both the truth behind Zwarst Bezaleel's identity and to find the right crystal to make his fathers weapon his own.