Sign in Blood

Target player draws two cards and loses 2 life.

Royal Assassin

Dread Warlock

Dread Warlock can't be blocked except by black creatures.

Unholy Strength

Enchant creature
Enchanted creature gets +2/+1.

Megrim

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Child of Night

Tendrils of Corruption

Tendrils of Corruption deals X damage to target creature and you gain X life, where X is the number of Swamps you control.

Warpath Ghoul

Bog Wraith

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Mind Shatter

Target player discards X cards at random.

Demon's Horn

Whenever a player casts a black spell, you may gain 1 life.

Weakness

Enchant creature
Enchanted creature gets -2/-1.

Black Knight

First strike (This creature deals combat damage before creatures without first strike.)
Protection from white (This creature can't be blocked, targeted, dealt damage, or enchanted by anything white.)

Wall of Bone

Defender (This creature can't attack.)
{B}: Regenerate Wall of Bone. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Mind Rot

Deathmark

Vampire Aristocrat

Sacrifice a creature: Vampire Aristocrat gets +2/+2 until end of turn.

Drudge Skeletons

{B}: Regenerate Drudge Skeletons. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Diabolic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Nightmare

Flying (This creature can't be blocked except by creatures with flying or reach.)
Nightmare's power and toughness are each equal to the number of Swamps you control.

Hypnotic Specter

Flying
Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.

Zombie Goliath

Soul Bleed

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, that player loses 1 life.

Assassinate

Kelinore Bat

Rise from the Grave

Put target creature card from a graveyard onto the battlefield under your control. That creature is a black Zombie in addition to its other colors and types.

Acolyte of Xathrid

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Disentomb

Return target creature card from your graveyard to your hand.

Consume Spirit

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

Haunting Echoes

Exile all cards from target player's graveyard other than basic land cards. For each card exiled this way, search that player's library for all cards with the same name as that card and exile them. Then that player shuffles.

Looming Shade

{B}: Looming Shade gets +1/+1 until end of turn.

Cemetery Reaper

Other Zombie creatures you control get +1/+1.
{2}{B}, {T}: Exile target creature card from a graveyard. Create a 2/2 black Zombie creature token.

Gravedigger

When Gravedigger enters, you may return target creature card from your graveyard to your hand.