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 Duel Academy and members of The Resistance. During the Invasion of Xyz Dimension, it is seen to be used against innocent non-Duelist habitants.

Process
When a duelist is defeated, the winner hits a button on his Duel Disk, which emits a purple light to cover the loser and dissolve him. Then a blank card with image of the dissolved duelist is released from the Duel Disk. This process seems to be irreversible under nomral circumstance.

Of Duel Academy

 * Citizens of Heartland City (by Duel Warriors)
 * By the Obelisk Force
 * Ashley
 * Bram
 * Carl
 * 7 unnamed 'Youth' class Duelists
 * Michio Mokota
 * Teppei Tairyobata
 * By Selena
 * Dipper
 * By Yuri
 * Halil
 * Olga

Of the Resistance

 * By Shay
 * Marco
 * Tio