Phigurphos, de Land Shaker

Flying
When Phigurphos, de Land Shaker enters the battlefield, you may sacrifice a creature. Reveal
cards from the top of your library until you
reveal a creature card with higher converted
mana cost. Put that card onto the battlefield
and the rest on the bottom of your library in a
random order.
{r/g}{g/w}: Return Phigurphos to your hand.