Apoptosis

As an additional cost to cast this card, sacrifice a creature.
Choose one -- Scry 1, then draw a card; or each opponent loses 1 life and you gain 1 life for each opponent who lost life in this way; or creatures you don't control can't attack during their controller's next turn.
"With enough ingenuity, even the worthless can contribute." - The Tyrant of Lissea