Persephone Unchained

Double strike, indestructible
Persephone Unchained enters the battlefield
tapped.
Persephone doesn't untap during your untap step.
{1}{b}{r}, {ut}, Sacrifice another creature:
Persephone deals damage equal to the sacrificed
creature's power to each creature. Then, she deals damage to each player equal to the sacrificed
creature's toughness.