Big Shield Gardna (YGLD-ENB14) - King of Games: Yugi's Legendary Decks Unlimited

During either player's turn, when this face-down card (and no other cards) is targeted by a Spell Card: Change this card to face-up Defense Position, and if you do, negate the Spell Card's activation. If this card is attacked, change it to Attack Position at the end of the Damage Step.