Guardian Sphinx is a Common Effect Monster card from Yu-Gi-Oh! (Structure Deck: Invincible Fortress, SD7). Current market price: $0.11.
Common
Structure Deck: Invincible Fortress (SD7)
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 opponent controls to the hand.
