Psycho-resonance is, it is rumoured, a facet of early arcane enchantment. It is married - in some inextricable yet indistinct way - to equilibrium: the use of, and recovery from, magical or mentally strenuous actions. It is sometimes referred to as one of the common arcana (along with bloodless balance) since, after the opening of Alessandria in the late 1100s, the newly restored tutors of the fabled library restored knowledge of psycho-resonance to many of the land's citizens; and ensured its teachings became part of the Loremaster specialisation of Opalescence.