
Jorubai Murk Lurker | Creature | Leech | Jorubai Murk Lurker gets +1/+1 as long as you control a Swamp.
{1}{B}: Target creature gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.) | Clint Cearley

Blood Host | Creature | Vampire | {1}{B}, Sacrifice another creature: Put a +1/+1 counter on Blood Host and you gain 2 life. | Cynthia Sheppard

Caustic Tar | Enchantment | Aura | Enchant land
Enchanted land has "{T}: Target player loses 3 life." | Jung Park

Endless Obedience | Sorcery | | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Put target creature card from a graveyard onto the battlefield under your control. | Karl Kopinski

Feast on the Fallen | Enchantment | | At the beginning of each upkeep, if an opponent lost life last turn, put a +1/+1 counter on target creature you control. | Dave Kendall

Gravedigger | Creature | Zombie | When Gravedigger enters the battlefield, you may return target creature card from your graveyard to your hand. | Dermot Power

Leeching Sliver | Creature | Sliver | Whenever a Sliver you control attacks, defending player loses 1 life. | Svetlin Velinov

Necrogen Scudder | Creature | Phyrexian Horror | Flying
When Necrogen Scudder enters the battlefield, you lose 3 life. | Raymond Swanland

Nightfire Giant | Creature | Zombie Giant | Nightfire Giant gets +1/+1 as long as you control a Mountain.
{4}{R}: Nightfire Giant deals 2 damage to any target. | Dave Kendall

Paragon of Open Graves | Creature | Skeleton Warrior | Other black creatures you control get +1/+1.
{2}{B}, {T}: Another target black creature you control gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy it.) | Min Yum

Stab Wound | Enchantment | Aura | Enchant creature
Enchanted creature gets -2/-2.
At the beginning of the upkeep of enchanted creature's controller, that player loses 2 life. | Scott Chou

Ulcerate | Instant | | Target creature gets -3/-3 until end of turn. You lose 3 life. | Johann Bodin

Wall of Limbs | Creature | Zombie Wall | Defender (This creature can't attack.)
Whenever you gain life, put a +1/+1 counter on Wall of Limbs.
{5}{B}{B}, Sacrifice Wall of Limbs: Target player loses X life, where X is Wall of Limbs's power. | Yeong-Hao Han

Xathrid Slyblade | Creature | Human Assassin | Hexproof (This creature can't be the target of spells or abilities your opponents control.)
{3}{B}: Until end of turn, Xathrid Slyblade loses hexproof and gains first strike and deathtouch. (It deals combat damage before creatures without first strike. Any amount of damage it deals to a creature is enough to destroy it.) | Steve Prescott