Black creatures get +1/+1.

Other Zombies you control get +1/+0.

Menace

Whenever a creature attacks one of your opponents, that player loses 1 life.

At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature.

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Call to the Grave.

Whenever another Zombie enters the battlefield under your control, put a +1/+1 counter on Champion of the Perished.

Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Goblin Warriors and a Goblin Shaman are on the battlefield, each gets +2/+2.)

Whenever another creature enters the battlefield under your control, each opponent loses 1 life.

Skeletons you control and other Zombies you control get +1/+1 and have deathtouch.

Deathtouch

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

Whenever another Zombie you control dies, target opponent loses 1 life.

Each opponent chooses a creature card in their graveyard. Put those cards onto the battlefield under your control.

At the beginning of your upkeep, create X 2/2 black Zombie creature tokens, where X is half the number of Zombies you control, rounded down.

When Eternal Skylord enters the battlefield, amass 2. (Put two +1/+1 counters on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)

Zombie tokens you control have flying.

Afflict 2 (Whenever this creature becomes blocked, defending player loses 2 life.)

Whenever Eternal of Harsh Truths attacks and isn't blocked, draw a card.

Whenever another creature you control dies, put a +1/+1 counter on Gavony Unhallowed.

Geralf's Messenger enters the battlefield tapped.

When Geralf's Messenger enters the battlefield, target opponent loses 2 life.

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

When Gleaming Overseer enters the battlefield, amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)

Zombie tokens you control have hexproof and menace.

Zombies you control have menace. (They can't be blocked except by two or more creatures.)

{3}{B}, Exile a creature card from your graveyard: Create a 2/2 black Zombie creature token.

Gravecrawler can't block.

You may cast Gravecrawler from your graveyard as long as you control a Zombie.

Each opponent loses 1 life for each creature you control.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Whenever Infectious Horror attacks, each opponent loses 2 life.

Flying, haste

Whenever an opponent casts their second spell each turn, draw a card.

Partner (You can have two commanders if both have partner.)

Zombies you control get +1/+0.

At the beginning of your end step, if a creature died this turn, you may pay {1}{B}. If you do, create a 2/2 black Zombie creature token.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Whenever a Human deals damage to you, destroy it.

Other non-Human creatures you control get +1/+1 and have undying. (When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Each opponent sacrifices a creature or enchantment.

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

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.)

As Obelisk of Urd enters the battlefield, choose a creature type.

Creatures you control of the chosen type get +2/+2.

Each opponent sacrifices an artifact creature and a nonartifact creature.

Undergrowth -- Rhizome Lurcher enters the battlefield with a number of +1/+1 counters on it equal to the number of creature cards in your graveyard.

When Rotting Rats enters the battlefield, each player discards a card.

Unearth {1}{B} ({1}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

At the beginning of your upkeep, discard a card.

Whenever a creature you control attacks, it gets +1/+0 until end of turn for each other attacking creature that shares a creature type with it.

When Sibsig Icebreakers enters the battlefield, each player discards a card.

Soulless One's power and toughness are each equal to the number of Zombies on the battlefield plus the number of Zombie cards in all graveyards.

Each other player sacrifices a creature. You create a 2/2 black Zombie creature token for each creature sacrificed this way.

At the beginning of your upkeep, each opponent loses X life and you scry X, where X is the number of Zombies you control.

{2}{U}{B}: Exile target creature card from a graveyard. Create a token that's a copy of it, except it's a 4/4 black Zombie.

When The Scarab God dies, return it to its owner's hand at the beginning of the next end step.

Haste

Whenever Thraximundar attacks, defending player sacrifices a creature.

Whenever a player sacrifices a creature, you may put a +1/+1 counter on Thraximundar.

Unbreathing Horde enters the battlefield with a +1/+1 counter on it for each other Zombie you control and each Zombie card in your graveyard.

If Unbreathing Horde would be dealt damage, prevent that damage and remove a +1/+1 counter from it.

Zombie spells you cast cost {1} less to cast.

Zombie creatures you control get +2/+1.

Vanishing 2 (This creature enters the battlefield with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)