Torture.
In a secret room at the royal palace of the Atlantis Empire in the Atlantian Domain, a naked male Atlantian was tied to a tube-shaped device as numerous wires and connections were made to his body.
A host of Atlantian Doctors garbed in white clothes attended to him as they constantly moved around the tube-shaped device, observing their test subject while at the same time imputing orders to the machines before them.
At times, the naked Atlantian struggled inside the tube-shaped device like he was in pain. This continued for a long time as the Doctors used all the different methods of brainwashing techniques known to the Atlantis Empire.
They combined magic and science to try brainwashing Sebastian.
After everything, hidden mechanisms were activated as water slowly started draining away from the tube-shaped device where Sebastian was kept.