Barter in Blood

Each player sacrifices two creatures of their choice.

Blood Seeker

Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Curse of Wizardry

As Curse of Wizardry enters, choose a color.
Whenever a player casts a spell of the chosen color, that player loses 1 life.

Soul Feast

Target player loses 4 life and you gain 4 life.

Blood Tithe

Each opponent loses 3 life. You gain life equal to the life lost this way.

Cabal Coffers

{2}, {T}: Add {B} for each Swamp you control.

Exquisite Blood

Whenever an opponent loses life, you gain that much life.

Consume Spirit

Spend only black mana on X.
Consume Spirit deals X damage to any target and you gain X life.

Sorin Markov

+2: Sorin Markov deals 2 damage to any target and you gain 2 life.
−3: Target opponent's life total becomes 10.
−7: You control target player during that player's next turn.

Poisonbelly Ogre

Whenever another creature enters, its controller loses 1 life.

Hissing Miasma

Whenever a creature attacks you, its controller loses 1 life.

Corrupt

Corrupt deals damage to any target equal to the number of Swamps you control. You gain life equal to the damage dealt this way.

Sorin's Vengeance

Sorin's Vengeance deals 10 damage to target player or planeswalker and you gain 10 life.