Other Zombies you control get +1/+0.

{3}{B}{B}, {T}, Sacrifice X other creatures: Return X target creature cards from your graveyard to the battlefield.

{5}{B}{B}: Put Champion of Stray Souls on top of your library from your graveyard.

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

{1}, {T}, Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.

{T}: Target player mills a card. (They put the top card of their library into their graveyard.)

{5}, {T}, Sacrifice Codex Shredder: Return target card from your graveyard to your hand.

{T}: Add one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

Enchant player

Whenever enchanted player is attacked, create a 2/2 black Zombie creature token. Each opponent attacking that player does the same.

Destroy target non-Elf creature.

When Garruk's Uprising enters the battlefield, if you control a creature with power 4 or greater, draw a card.

Creatures you control have trample. (They can deal excess combat damage to the player or planeswalker they're attacking.)

Whenever a creature with power 4 or greater enters the battlefield under your control, draw a card.

Zombies you control have flying.

{U}, {T}, Sacrifice another nontoken creature: Create an X/X blue Zombie creature token, where X is the sacrificed creature's toughness.

Tap five untapped Zombies you control: Put target creature card from a graveyard onto the battlefield under your control.

When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)

Choose one or both --

• Return target creature card from your graveyard to your hand.

• Return target land card from your graveyard to your hand.

{1}, {T}, Discard a card: Put a study counter on Grimoire of the Dead.

{T}, Remove three study counters from Grimoire of the Dead and sacrifice it: Put all creature cards from all graveyards onto the battlefield under your control. They're black Zombies in addition to their other colors and types.

{1}: You may cast target creature card in a graveyard this turn. When you cast it this turn, Havengul Lich gains all activated abilities of that card until end of turn.

Kicker {5}{B} (You may pay an additional {5}{B} as you cast this spell.)

Menace

When Josu Vess, Lich Knight enters the battlefield, if it was kicked, create eight 2/2 black Zombie Knight creature tokens with menace.

When Lazotep Reaver 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.)

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.

Zombies you control get +1/+1.

When Liliana's Mastery enters the battlefield, create two 2/2 black Zombie creature tokens.

Deathtouch

Whenever Liliana's Reaver deals combat damage to a player, that player discards a card and you create a tapped 2/2 black Zombie creature token.

Undergrowth -- When Lotleth Giant enters the battlefield, it deals 1 damage to target opponent for each creature card in your graveyard.

Creatures you control are every creature type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

{3}, {T}: Create a 2/2 blue Shapeshifter creature token with changeling. (It is every creature type.)

Flying

Whenever you create or sacrifice a token, each opponent loses 1 life.

Trample, lifelink

Destroy target creature.

Destroy all creatures, then return a creature card put into a graveyard this way to the battlefield under your control. It's a black Zombie in addition to its other colors and types. Exile Necromantic Selection.

Each player sacrifices six creatures. You create six tapped 2/2 black Zombie creature tokens.

Whenever a nontoken creature you control dies, create a 2/2 black Zombie creature token.

Flying

When Overseer of the Damned enters the battlefield, you may destroy target creature.

Whenever a nontoken creature an opponent controls dies, create a tapped 2/2 black Zombie creature token.

Mutate {G}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

{1}, {T}: Look at the top card of your library. If it's a land card, you may put it onto the battlefield. If you don't put the card onto the battlefield, put it into your hand.

Kicker {1}{B} (You may pay an additional {1}{B} as you cast this spell.)

Draw three cards, then discard two cards. If this spell was kicked, target player discards two cards.

Destroy target artifact or creature. It can't be regenerated.

Put target land card from a graveyard onto the battlefield under your control.

{T}, Tap an untapped creature you control: Add one mana of any color.

Scavenge {6}{B} ({6}{B}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

{T}: Draw a card, then discard a card.

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

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Whenever Tomebound Lich enters the battlefield or deals combat damage to a player, draw a card, then discard a card.

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.

Whenever Vengeful Dead or another Zombie dies, each opponent loses 1 life.

Choose two target creature cards in your graveyard. Sacrifice a creature. If you do, return the chosen cards to the battlefield tapped.

Flying

Whenever a card is put into an opponent's graveyard from anywhere, put a +1/+1 counter on Vulturous Zombie.

Whenever you draw your second card each turn, target opponent loses 2 life and you gain 2 life.

{T}, Sacrifice another creature: Draw a card. You may put a land card from your hand onto the battlefield tapped. If you control eight or more lands, repeat this process once.