Sadistic Task Mage

{b/r}, {t}, Discard a card: Put a -1/-1 counter on target creature.
{1}{b}{r}, {t}, Discard a card: Tap target untapped creature. It deals damage equal to its power to its controller.
{3}{b/r}{b/r}, {t}, Discard a card: Target player discards their hand unless he or she pays 7 life.