When Jaza, Cainhurst Pyromancer enters the battlefield, if you control no Vampires, return target Vampire from your graveyard to the battlefield tapped.
Sacrifice a creature: Each opponent sacrifices a creature. If they can't, they discard a card.
When Jaza, Cainhurst Pyromancer dies, transform.
When Jaza, The Tormented is put into play, search your library for up to 2 Horror cards, put them into your hand, then shuffle your library.
Sacrifice a Vampire: Jaza, The Tormented gets +2/+2 and lifelink until end of turn. Activate this ability as a socery, and only once per turn.
Jaza was a bright pupil, but she knew what she had sacrificed to join our cause. Being human in a world of vampires has it's downsides...