Magic Drain is an inherent constraint: supernatural potency is limited, and an entity's access to extraordinary power is reduced or unavailable.
Magic Drain denotes a narrative vulnerability in which supernatural potency is diminished, constrained, or made unavailable through an external or internal influence, limiting an entity’s effective agency.
As a symbolic structure, Magic Drain can express dependence on finite or vulnerable sources of power, distinguishing extraordinary capacity from unlimited authority and shaping narrative constraints without defining a tradition.