Human Sealing Technology

Human Sealing Technology is a technology installed in some Duel Disks allows winners of a Duel to seal the losers into cards. This technology is mainly used by Duel Warriors of Academiaundefined and members of the Resistanceundefined. During the Invasion of Xyz Dimension, it is seen being used against innocent non-Duelist habitants.undefinedundefinedundefined After Fusion Dimension Machine is activated to create the ARC-V, all carded people are returned.undefinedundefinedundefinedundefined

Process
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.undefinedundefined The user activates the function on his/her Duel Disk, which emits a purple light (or beam) that cover the loser. The victim's body is dissolved, and a blank card containing the soul of the victim is then released from the Duel Disk. 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.undefinedundefined It is possible to seal multiple victims simultaneously as well.undefinedundefinedundefined It is also possible for the user to seal themselves into a card when they lose a Duel.undefined This process seems to be irreversible by LDS's technologyundefined (however they are able to disable this ability as Shun's Duel Disk can't use it anymoreundefined). 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.undefined

Due to the technology originating from the Fusion Dimension, it glows with a purple light, though Kaito Tenjō somehow modified it to light blue.undefined

According to Edo Phoenix, there is a way to undo the process but in order to do this, you would need the original carded person. The people sealed into cards are sent back to Academia to be used as life energy for the ARC Area Project. Once the project has been completed, the people will be released and permitted to live in the utopia of the merged dimensions.undefined Leo Akaba stated that ARC-V was fueled by life energy, and the carded people were to be converted into that life energy to start the machine.undefined Those who were sealed into cards were released when the dimensions began to merge after they were absorbed into ARC-V.undefinedundefinedundefinedundefined

Of Academia
By the Obelisk Force By Serena By Sora Shiun'in By Yūri By Juvenile Officers By the Tyler sisters By Dennis Macfield By Battle Beast By Leo Akaba
 * Citizens of Heartland City (by Duel Warriors)undefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefined
 * Ashleyundefined
 * Bramundefined
 * Carlundefined
 * 7 unnamed 'Youth' class Duelistsundefined
 * Michio Mokotaundefined
 * Teppei Tairyōbataundefined
 * Hokuto Shijimaundefined
 * Hikageundefined
 * Halilundefined
 * Olgaundefined
 * You Show Duel School Studentsundefined
 * Asuka Tenjōinundefined
 * Yūshō Sakakiundefined
 * Asuka's friendundefined
 * Spade Branch Resistance Duelist (off-screen)undefined
 * Himselfundefined
 * Bernieundefined
 * Ethanundefined
 * Tedundefined
 * Tsukikageundefined
 * Emmaundefined
 * Jacobundefined
 * Crow Hoganundefined
 * Doctorundefined

Of the Resistance
By Shun Kurosaki By Kaito Tenjō
 * Marcoundefined
 * Tioundefined
 * 3 unnamed LDS elitesundefined
 * An unnamed Academia Soldierundefined
 * 6 unnamed Academia Soldiersundefinedundefined