A forgotten and ancient form of alchemy. Mana energy is transferred across a wide radius, using one's voice as a conduit. These songs thereby bewitch the minds, bodies and spirits of their audiences.
Normal people are unable to use a galdr. This rare magic is limited to alchemists of exceptional power, like the Valkyria.
Depending on the will of its user, it is said to either heal or harm. Those who hear a Valkyria's requiem, for example, are mentally overwhelmed by mana before suffering a swift yet painful death.