Card Errata:Guardian Sphinx

New Card Lore: Once per turn during your Main Phase, you can flip this card into face-down Defense Position. When this card is Flip Summoned, return all monsters on your opponent's side of the field to the owner's hand.

Old Card Lore: You can flip this card into face-down Defense Position once per turn during your Main Phase. When this card is Flip Summoned, return all monsters on your opponent's side of the field to the owner's hand.