Hell's Caretaker, Satan

: When you cast this planeswalker all opponents must sacrifice five permanents or discard their hand. If they cannot do either, they lose the game.
X: Draw two cards, then discard a card. X is equal to the amount of permanents you control minus the number of permanents your opponent controls.
-20: -20: Take control of all permanents. They are all untapped and have haste.