Jetto's Disease

Accute Industria, also known as Jetto's disease, is a condition in which a person is born with an abnormally low amount of energy in their bodies, which causes them to face difficulties later in life when trying to learn basic energy usage and/or techniques. People with accute industria cannot learn magic, as the spells require advanced energy control that is impossible for them to learn.

Treatment
There is no known way to treat acute industria, and the only way to avoid the complications is to never use energy.