Your search for "Guardian Sphinx RP02-EN067" revealed the following:
Guardian Sphinx (2020 Date Reprint) - RP02-EN067 - Common from Retro Pack 2 (2020 Date Reprint), available at 401 Games Canada. Rarity: Common Card Text:Once per turn, you can flip this card into face-down Defense Position. When this card is...
Guardian Sphinx - RP02-EN067 - Common from Retro Pack 2, available at 401 Games Canada. Rarity: Common Card Text:Once per turn: You can change this card to face-down Defense Position. When this card is Flip Summoned: Return all monsters your...