DISCLAIMER: This app is NOT a dueling system and will never allow you to duel. This app is merely a tool to assist you with constructing decks for playing Yu-Gi-Oh. I am not endorsed by or affiliated with Konami, and the purpose of this app is to complement the game of Yu-Gi-Oh, not to usurp it or replace it. This app is only useful if you have actual Yu-Gi-Oh cards to play with, so show your support for Konami by buying real Yu-Gi-Oh cards and playing the real game. This app can help your organize your cards into decks, but this app will NEVER allow you to duel. It isn't my place to offer dueling; I merely want to offer a helpful service to duelists.