Whenever Noxious Ghoul or another Zombie enters the battlefield, all non-Zombie creatures get -1/-1 until end of turn.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Other creatures you control with infect get +1/+1.

Whenever you cast a creature spell with infect, target player gets a poison counter.

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

Protection from white

Marauding Knight gets +1/+1 for each Plains your opponents control.

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

Whenever combat damage is dealt to you or a planeswalker you control, if Vengeful Pharaoh is in your graveyard, destroy target attacking creature, then put Vengeful Pharaoh on top of your library.

Other Zombie creatures you control get +1/+1.

, : Exile target creature card from a graveyard. Put a 2/2 black Zombie creature token onto the battlefield.

Put Deadhead into play. Use this ability only if any opponent loses contact with his or her hand of cards and only if Deadhead is in your graveyard.

Trample

As Sutured Ghoul enters the battlefield, exile any number of creature cards from your graveyard.

Sutured Ghoul's power is equal to the total power of the exiled cards and its toughness is equal to their total toughness.

, , Sacrifice Apprentice Necromancer: Return target creature card from your graveyard to the battlefield. That creature gains haste. At the beginning of the next end step, sacrifice it.

Intimidate

: Put target artifact or creature card with converted mana cost X from an opponent's graveyard onto the battlefield under your control tapped. Then that player puts the top X cards of his or her library into his or her graveyard.

When Grave Defiler enters the battlefield, reveal the top four cards of your library. Put all Zombie cards revealed this way into your hand and the rest on the bottom of your library in any order.

: Regenerate Grave Defiler.

When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.