Kethek, Crucible Goliath (ONE-319) - Phyrexia: All Will Be One: (Showcase) (Borderless)

At the beginning of your end step, you may sacrifice another creature. If you do, reveal cards from the top of your library until you reveal a nonlegendary creature card with lesser mana value, put it onto the battlefield, then put the rest on the bottom of your library in a random order.