Jerry, the Self-Loathing

You are one of your opponents. (You may target
and attack yourself as an opponent, effects you
control that affect each opponent affect you as well,
you are counted in your total number of opponents,
and you cannot win by reducing the life totals of
your opponents to 0.)

{2}{b}{r},{t}: Each opponent sacrifices one creature, discards two cards, and loses 3 life. You gain X {r} and draw X cards, where X is the amount of creatures sacrificed this way.