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

Deathtouch Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Fell Stinger exploits a creature, target player draws two cards and loses 2 life.

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

Grimgrin, Corpse-Born enters the battlefield tapped and doesn't untap during your untap step. Sacrifice another creature: Untap Grimgrin and put a +1/+1 counter on it. Whenever Grimgrin attacks, destroy target creature defending player controls, then put a +1/+1 counter on Grimgrin.

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

Menace (This creature can't be blocked except by two or more creatures.) When Relentless Dead dies, you may pay {B}. If you do, return it to its owner's hand. When Relentless Dead dies, you may pay {X}. If you do, return another target Zombie creature card with mana value X from your graveyard to the battlefield.

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

{1}{B}, {T}, Discard a card: Create a 2/2 black Zombie creature token. Tap three untapped Zombies you control: You draw a card and you lose 1 life.

Sacrifice X Zombies, then reveal cards from the top of your library until you reveal a number of Zombie creature cards equal to the number of Zombies sacrificed this way. Put those cards onto the battlefield and the rest on the bottom of your library in a random order.

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard. Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying Other Zombies you control have flying. Whenever one or more Zombies you control deal combat damage to one or more of your opponents, you may draw cards equal to the number of opponents dealt damage this way. If you do, discard that many cards.

Whenever a creature you control dies, draw a card. +1: Create a 2/2 black Zombie creature token. −4: Each player sacrifices two creatures. −9: Each opponent chooses a permanent they control of each permanent type and sacrifices the rest.

Whenever a nontoken creature you control dies, Midnight Reaper deals 1 damage to you and you draw a card.

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays {4}.

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

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Target player mills two cards. Draw a card.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Draw three cards.

Whenever Undead Augur or another Zombie you control dies, you draw a card and you lose 1 life.

Bojuka Bog enters the battlefield tapped. When Bojuka Bog enters the battlefield, exile target player's graveyard. {T}: Add {B}.

As Choked Estuary enters the battlefield, you may reveal an Island or Swamp card from your hand. If you don't, Choked Estuary enters the battlefield tapped. {T}: Add {U} or {B}.

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

({T}: Add {U} or {B}.) Contaminated Aquifer enters the battlefield tapped.

{T}: Add {C}. {1}, {T}, Sacrifice Cryptic Caves: Draw a card. Activate only if you control five or more lands.

Darkslick Shores enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {U} or {B}.

{1}, {T}: Add {U}{B}.

Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp. {T}: Add {U} or {B}.

{T}: Add one mana of any color that a land an opponent controls could produce.

{T}, Sacrifice Fabled Passage: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.

({T}: Add {U} or {B}.) Fetid Pools enters the battlefield tapped. Cycling {2} ({2}, Discard this card: Draw a card.)

({T}: Add {U}.)

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

Port of Karfell enters the battlefield tapped. {T}: Add {U}. {3}{U}{B}{B}, {T}, Sacrifice Port of Karfell: Mill four cards, then return a creature card from your graveyard to the battlefield tapped. (To mill a card, put the top card of your library into your graveyard.)

Shipwreck Marsh enters the battlefield tapped unless you control two or more other lands. {T}: Add {U} or {B}.

({T}: Add {U} or {B}.) Sunken Hollow enters the battlefield tapped unless you control two or more basic lands.

({T}: Add {B}.)

{T}: Add {C}. {T}: Add {U} or {B}. Activate only if you control a Swamp.

Temple of Deceit enters the battlefield tapped. When Temple of Deceit enters the battlefield, scry 1. {T}: Add {U} or {B}.

({T}: Add {U} or {B}.) Undercity Sewers enters the battlefield tapped. When Undercity Sewers enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

{T}: Add {C}. {B}, {T}: Put target Zombie card from your graveyard on top of your library.

Waterfront District enters the battlefield tapped. {T}: Add {U} or {B}. {2}{U}{B}, {T}, Sacrifice Waterfront District: Draw a card.

Target player mills ten cards.

When Master of Death enters the battlefield, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) At the beginning of your upkeep, if Master of Death is in your graveyard, you may pay 1 life. If you do, return it to your hand.

Deathtouch When Mire Triton enters the battlefield, mill two cards and you gain 2 life.

When Stitcher's Supplier enters the battlefield or dies, mill three cards.

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

Add {B}{B}{B}.

{T}: Add {C}{C}.

Add {B} for each creature card in your graveyard.

Gravecrawler can't block. You may cast Gravecrawler from your graveyard as long as you control a Zombie.

Choose a creature type. Return up to two creature cards of that type from your graveyard to the battlefield. If this spell was foretold, return all creature cards of that type from your graveyard to the battlefield instead. Foretell {5}{B}{B} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Each player exiles all creature cards from their graveyard, then sacrifices all creatures they control, then puts all cards they exiled this way onto the battlefield.

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 player chooses a creature type. Each player returns all creature cards of a type chosen this way from their graveyard to the battlefield.

Deathtouch Curse of the Walking Pox — Whenever you cast a spell from anywhere other than your hand, return Poxwalkers from your graveyard to the battlefield tapped.

Put target creature card from a graveyard onto the battlefield under your control. You lose life equal to its mana value.

Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Repository Skaab exploits a creature, return target instant or sorcery card from your graveyard to your hand.

Put all creature cards from all graveyards onto the battlefield under your control.

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

Counter target spell.

Whenever a creature you control dies, each other player sacrifices a creature.

This spell costs {2} less to cast if it targets a legendary creature. Destroy target creature. Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

When Ravenous Rotbelly enters the battlefield, you may sacrifice up to three Zombies. When you sacrifice one or more Zombies this way, each opponent sacrifices that many creatures.

When The Meathook Massacre enters the battlefield, each creature gets -X/-X until end of turn. Whenever a creature you control dies, each opponent loses 1 life. Whenever a creature an opponent controls dies, you gain 1 life.

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

{3}, {T}, Sacrifice another Zombie: Create two tokens that are copies of the sacrificed creature.

Diregraf Colossus enters the battlefield with a +1/+1 counter on it for each Zombie card in your graveyard. Whenever you cast a Zombie spell, create a tapped 2/2 black Zombie creature token.

{1}{B}, {T}, Sacrifice a creature: Search your library for a Zombie card and a Swamp card, reveal them, put them into your hand, then shuffle.

Deathtouch Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Sidisi, Undead Vizier exploits a creature, you may search your library for a card, put it into your hand, then shuffle.

Search your library for up to three creature cards, put them into your graveyard, then shuffle.

{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.

Whenever a nontoken Zombie enters the battlefield under your control, create a token that's a copy of that creature.