Serena and Shun, who themselves used the technology, showed no attempt to release their LDS's victims after they joined the Lancers, suggesting that not even regular members of Academia and the Resistance have the ability to undo it.

This process seems to be irreversible by LDS's technology (however they are able to disable this ability as Shun's Duel Disk can't use it anymore ). It is also possible for the user to seal themselves into a card when they lose a Duel. It is possible to seal multiple victims simultaneously as well. The blank card then forms an image of the dissolved victim, in his/her last pose before being sealed, in a fashion similar to photos taken from a photo camera. The victim's body is dissolved, and a blank card containing the soul of the victim is then released from the Duel Disk. The user activates the function on his/her Duel Disk, which emits a purple light (or beam) that cover the loser. In order to use the device, the user must first defeat the target in a Duel, but if the target is unable to Duel, the user can seal them in a card right away.

Yu gi oh season 5 episode 31