Robert, Phyrexians' Wrath

+1: Sacrifice up to one creature. Then draw 2 cards, gain 2 life, and add {b}{b} to your mana pool for each creature you sacrifice.
-2: Sacrifice up to one creature. Then each opponent discards a card, loses 2 life, and sacrifices one creature for each creature you sacrifice.
-8: You get an emblem with "When a source deals damage to you, you may discard a card and that sources owner sacrifices that many permanents."