Festering Goblin

When Festering Goblin dies, target creature gets -1/-1 until end of turn.

Vicious Hunger

Vicious Hunger deals 2 damage to target creature and you gain 2 life.

Phyrexian Arena

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

Shepherd of Rot

{T}: Each player loses 1 life for each Zombie on the battlefield.

Graveborn Muse

At the beginning of your upkeep, you draw X cards and you lose X life, where X is the number of Zombies you control.

Carnophage

At the beginning of your upkeep, tap Carnophage unless you pay 1 life.

Swamp

Dark Ritual

Gravedigger

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

Raise Dead

Return target creature card from your graveyard to your hand.

Stromgald Crusader

Protection from white
{B}: Stromgald Crusader gains flying until end of turn.
{B}{B}: Stromgald Crusader gets +1/+0 until end of turn.

Barren Moor

Barren Moor enters the battlefield tapped.
{T}: Add {B}.
Cycling {B} ({B}, Discard this card: Draw a card.)

Gempalm Polluter

Cycling {B}{B} ({B}{B}, Discard this card: Draw a card.)
When you cycle Gempalm Polluter, you may have target player lose life equal to the number of Zombies on the battlefield.

Imperial Seal

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

Undead Gladiator

{1}{B}, Discard a card: Return Undead Gladiator from your graveyard to your hand. Activate only during your upkeep.
Cycling {1}{B} ({1}{B}, Discard this card: Draw a card.)