You are the owner of all cards that in your Decks (Main, Side, and Extra) and in your Graveyard at the start of a given Duel. While control of those cards may be switched over to another player by cards such as "Change of Heart", "Creature Swap and the like, that person can never become the owner of those cards. When a card is removed from the field in any way, the card(s) in question must always go to their owner's zone, regardless of whom controlled the card(s).

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