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You may only have one 'All-Out Attack' in your deck.

While this card is being cast, your opponent can't cast any more spells on that stack.

●：Only cast this card during a fight where a single unit of yours is attacking and your life is lower than your opponent's.

　　Increase that unit's Attack by the difference between your and your opponent's life until the fight ends.

　　After this effect executes the Attack and Defense of that unit can't be changed until the fight ends.