Sacrificial Rites

Whenever a nontoken creature you control dies,
put a blood counter on Sacrificial Rites.
{b}{b}, Sacrifice a creature: Draw a card. Activate
this ability only once each turn and only when
you could cast a sorcery.
{6}{b}{b}: Each opponent loses life equal to the
number of blood counters on it. You gain life
equal to the amount of life lost this way.