What is an obscurus?

The Obscurus is a dark, destructive force that manifests when a young witch or wizard suppresses their magical abilities out of fear or shame. It builds up inside the individual until it eventually bursts forth, wreaking havoc and causing chaos.

Obscuruses are typically invisible to the naked eye, but they can be detected through a swirling, black mist or by the destructive effects they have on their surroundings. They are incredibly volatile and dangerous, capable of causing widespread destruction and even death.

It is believed that Obscuruses are the result of emotional and psychological trauma, often stemming from the suppression of magical abilities by the individual or by external forces such as abuse or persecution. They are extremely difficult to control and nearly impossible to cure, as they are essentially the physical manifestation of suppressed magic.

Obscuruses are featured in the "Fantastic Beasts" series of movies and were introduced by J.K. Rowling as a new magical concept in the wizarding world.