Goregorger

Creature -- Zombie (U)
Sacrifice another creature: Put two +1/+1 counters on Goregorger.
2/2

Heliod's Agony
Sorcery
Each player loses life equal to his or her devotion to white, and you gain life equal to the amount of life lost this way.

Ill Omen

Sorcery (C)
Target opponent reveals the top card of his or her library and loses life equal to its converted mana cost.
Draw a card.

Jeweled Demon
Creature — Demon
Flying
Pay 3 life: Draw a card for each Aura or Equipment attached to Jeweled Demon.
5/3

Kick the Bucket |
Instant
Destroy target creature that entered the battlefield before all other creatures on the battlefield.
Time kills all.

Lace
Instant (R)
Any number of target instant or sorcery spells gain "Lose 5 life."

"Feel free to pick your poison. Each one ends the same way."
- Eflez Ke Ke, Newt Champion

Magebane Hex
Enchantment — Aura
Enchant creature
Whenever enchanted creature becomes the target of a spell or ability, that spell or ability's controller loses 5 life.

Netherworld Debt
Sorcery
Name a creature card. Return all cards with that name from your graveyard to the battlefield. They gain haste. At end of turn, exile them.
His guilt finally came calling.

Paralyzing Terror
Sorcery
Target player reveals his or her hand and you choose up to two nonartifact, nonblack cards from it. That player discards those cards.

blah nothing to see here.

Questmare
Creature- Nightmare Horse
Every time you cause an opponent to lose life outside of combat damage, put a +1/+1 counter on Questmare.

Reach of Mastix's Lash
Enchantment
Whenever [b]Reach of Mastix's Lash enters the battlefield, you gain control of all Spirit and/or Zombie permanents.
Spirit and/or Zombie permanents enter the battlefield under your control.

Sell Your Soul |
Sorcery
Target opponent controls you during your next turn.
Draw three cards.

Very cool. Very broken, but very cool.

Yeah, I'd probably make it like or and drop it to two cards, since the opponent just isn't likely to be able to do much damage to you that early. But super cool idea. I'd nominate it for CotW if that was here.

Tear Out the Still-Beating Heart
Sorcery
Destroy target non-artifact creature. Put onto the battlefield a black artifact token with "Sacrifice this artifact: Target creature card in your graveyard gains unearth until end of turn. Its unearth cost is equal to its mana cost."

When balancing it against Sign In Blood I can see why the selection of B instead of BB since many times losing 2 life would be better than your opponent controlling you. Maybe if you added a "You can't play spells this turn." or something to try to offset just drawing tons of cards, doing something powerful and then not caring if your opponent got to control you next turn, assuming they are still alive, which would be unlikely except in the most desperate of cases.

Tear out the Still-Beating Heart is also a very cool card. This is going to be very difficult to follow.

Umbilical Lich
Creature - Zombie Wizard
Exile a spell you control: Return Umbilical Lich from your graveyard to the battlefield.
It was tethered to life and drawn back by magic.
3/2

Voracious Ghoul

Creature -- Zombie (C)
At the beginning of your upkeep, sacrifice Voracious Ghoul unless you exile a card from your graveyard.
2/2

Waxing Moon
Enchantment

At the beginning of your upkeep, if you control no creatures, sacrifice Waxing Moon. Otherwise, put a wax counter on Waxing Moon, then you lose life equal to the number of wax counters on it.
Creatures you control get +1/+1 for each wax counter on Waxing Moon.

Xathrid Ritualist

Creature -- Human Wizard (R)
At the beginning of your upkeep, draw a card and lose 1 life if you devotion to black is five or greater.
2/1