Card Review; Guardian Sphinx

Guardian Sphinx is a level 5 Earth attribute rock/effect type monster with 1700 ATK and 2400 DEF. It's effect is the best part of the monster. Here is Guardian Shpinx's effect. 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 opponents side of the field to the owner's hand. Guardian Sphinx is one of my favorite Rock type.