The Nocturnian Headless Lady

The Day of My Murder - Whenever this creature blocks a creature, it deals damage to that creature equal to the sum of that creature’s power and toughness.

The Feast - Whenever you cast a creature spell, you may ally with it. (To ally with a creature, pay {1}. Each time this creature attacks, all creatures you are allied with attack alongside it.)

"On the night of her death, a new bond was forged — one of blood, song, and vengeance."