You have the ability to confine characters into Yu-Gi-Oh! Cards, where you can then use them to form your own, unique deck filled with all of your captured characters. You need a blank card to seal a character inside. Once characters have been captured into a card, you can design them however you’d like, and then Summon them. Once they are Summoned, the card-character will be loyal and devoted to you, and obey any command you give them. You can use other Spell Cards on card-characters as well.