You gain a Yu-Gi-Oh deck that is based off of your personal beliefs, history, and personality, you also gain a duel disk. You are now a master at children's card games.
As long as you believe in the "Heart of the Cards" you find that when playing a game of any sort you always seem to get just what you need at any moment.
You may summon digital replicas of a card, and activate spells and traps in any fight with a parahuman.