Fell

Murder

Cabal Coffers

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

Damnation

Destroy all creatures. They can't be regenerated.

Pestilence Demon

Flying
{B}: This creature deals 1 damage to each creature and each player.

Visara the Dreadful

Flying
{T}: Destroy target creature. It can't be regenerated.

Royal Assassin

Thrashing Wumpus

{B}: This creature deals 1 damage to each creature and each player.

Sign in Blood

Target player draws two cards and loses 2 life.

Gilded Lotus

Exquisite Blood

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

Swamp

Kalakscion, Hunger Tyrant

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.

Nantuko Shade

{B}: This creature gets +1/+1 until end of turn.

Mark of the Vampire

Enchant creature
Enchanted creature gets +2/+2 and has lifelink.

Morbid Plunder

Return up to two target creature cards from your graveyard to your hand.

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.

Grasp of Darkness

Target creature gets -4/-4 until end of turn.

Squelching Leeches

Squelching Leeches's power and toughness are each equal to the number of Swamps you control.

Bloodgift Demon

Flying
At the beginning of your upkeep, target player draws a card and loses 1 life.

Defile

Target creature gets -1/-1 until end of turn for each Swamp you control.

Phyrexian Arena

At the beginning of your upkeep, you draw a card and you lose 1 life.

Typhoid Rats

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)