Her excursion to the past provoked a great disturbance to the life paths of all those she met, changing the present so dramatically that no fewer than twenty-five of their descendants vanished in the present, having been ' un-born'. When she was finally retrieved to the present, her body had aged five centuries, and, irreparably damaged, she died in St Mungo's Hospital for Magical Maladies and Injuries.

Eloise Mintumble was sent to the year 1402, wherein she became stuck for a period of five days. In 1899, the Department of Mysteries conducted its last experience concerning time-travelling back in time for more than a few hours. Consequently, the use of Time-Turners, which could only take the user back in time and not into the future, since they were charmed with an Hour-Reversal Charm, were hedged around with hundreds of laws. At one point, it was noted, however, that whereas magic made it possible to go back in time, their researched had showed that a prospective time traveller could go back for a period of no more than five hours, as any further meant that the person in question would run the risk of doing great damage to both themselves and time itself.

Time-related magic was unstable, however, and as serious breaches in the laws of time was widely accepted to potentially result in catastrophe if meddled with, the investigations conducted in the Department of Mysteries was largely shrouded in mystery. Time was governed by natural laws which magic could explore and, to a certain and limited degree, manipulate, and, as such, there was a room devoted to its study in the Department of Mysteries, the Time Room. ' Just as the human mind cannot comprehend time, so it cannot comprehend the damage that will ensue if we presume to tamper with its laws.' - Professor Saul Croaker

Hogwarts legacy time period