Ghost Hounds

Vigilance
Whenever this creature blocks or becomes blocked by a white creature, this creature gains first strike until end of turn.

Lost Soul

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Bloodghast

This creature can't block.
This creature has haste as long as an opponent has 10 or less life.
Landfall — Whenever a land you control enters, you may return this card from your graveyard to the battlefield.

Cabal Ritual

Add {B}{B}{B}.
Threshold — Add {B}{B}{B}{B}{B} instead if seven or more cards are in your graveyard.

Emissary of Despair

Flying
Whenever this creature deals combat damage to a player, that player loses 1 life for each artifact they control.

Moira, Urborg Haunt

Menace
Whenever Moira deals combat damage to a player, return to the battlefield target creature card in your graveyard that was put there from the battlefield this turn.

Skulking Ghost

Flying
When this creature becomes the target of a spell or ability, sacrifice it.

Revenant

Flying
Revenant's power and toughness are each equal to the number of creature cards in your graveyard.

Kemuri-Onna

When this creature enters, target player discards a card.
Whenever you cast a Spirit or Arcane spell, you may return this creature to its owner's hand.

Swamp

Banshee of the Dread Choir

Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)
Whenever this creature deals combat damage to a player, that player discards a card.

Nether Spirit

At the beginning of your upkeep, if this card is the only creature card in your graveyard, you may return this card to the battlefield.

Sol Ring

Nether Traitor

Haste
Shadow (This creature can block or be blocked by only creatures with shadow.)
Whenever another creature is put into your graveyard from the battlefield, you may pay {B}. If you do, return this card from your graveyard to the battlefield.

He Who Hungers

Flying
{1}, Sacrifice a Spirit: Target opponent reveals their hand. You choose a card from it. That player discards that card. Activate only as a sorcery.
Soulshift 4 (When this creature dies, you may return target Spirit card with mana value 4 or less from your graveyard to your hand.)

Bile Urchin

Sacrifice this creature: Target player loses 1 life.

Shinen of Fear's Chill

This creature can't block.
Channel — {1}{B}, Discard this creature: Target creature can't block this turn.

Gravelighter

Flying
When this creature enters, draw a card if a creature died this turn. Otherwise, each player sacrifices a creature of their choice.

Iname, Death Aspect

When Iname enters, you may search your library for any number of Spirit cards, put them into your graveyard, then shuffle.

Farbog Revenant

Skulk (This creature can't be blocked by creatures with greater power.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Howling Banshee

Flying
When this creature enters, each player loses 3 life.

Skullmane Baku

Whenever you cast a Spirit or Arcane spell, you may put a ki counter on this creature.
{1}, {T}, Remove X ki counters from this creature: Target creature gets -X/-X until end of turn.

Foul Familiar

This creature can't block.
{B}, Pay 1 life: Return this creature to its owner's hand.

Accursed Spirit

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

Gray Merchant of Asphodel

When this creature enters, 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.)

Infernal Kirin

Flying
Whenever you cast a Spirit or Arcane spell, target player reveals their hand and discards all cards with that spell's mana value.

Kami of Lunacy

Flying
Soulshift 5 (When this creature dies, you may return target Spirit card with mana value 5 or less from your graveyard to your hand.)

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.

Cabal Coffers

{2}, {T}: Add {B} for each Swamp you control.

Eerie Soultender

When this creature enters, mill three cards. (Put the top three cards of your library into your graveyard.)
{4}{B}, Exile this card from your graveyard: Return another target creature card from your graveyard to your hand.

Exsanguinate

Each opponent loses X life. You gain life equal to the life lost this way.

Entropic Specter

Flying
As this creature enters, choose an opponent.
Entropic Specter's power and toughness are each equal to the number of cards in the chosen player's hand.
Whenever this creature deals damage to a player, that player discards a card.

Harbinger of Night

At the beginning of your upkeep, put a -1/-1 counter on each creature.

Songs of the Damned

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

Banshee

{X}, {T}: This creature deals half X damage, rounded down, to any target, and half X damage, rounded up, to you.

Horobi, Death's Wail

Flying
Whenever a creature becomes the target of a spell or ability, destroy that creature.

Ashen-Skin Zubera

When this creature dies, target opponent discards a card for each Zubera that died this turn.

Will-o'-the-Wisp

Flying (This creature can't be blocked except by creatures with flying or reach.)
{B}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Lost Legion

When this creature enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Spirit of Malevolence

When this creature dies, each opponent loses 1 life and you gain 1 life.

Thief of Hope

Whenever you cast a Spirit or Arcane spell, target opponent loses 1 life and you gain 1 life.
Soulshift 2 (When this creature dies, you may return target Spirit card with mana value 2 or less from your graveyard to your hand.)

Gibbering Kami

Flying
Soulshift 3 (When this creature dies, you may return target Spirit card with mana value 3 or less from your graveyard to your hand.)

Crypt Ghast

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)
Whenever you tap a Swamp for mana, add an additional {B}.

Ugin's Conjurant

This creature enters with X +1/+1 counters on it.
If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage and remove that many +1/+1 counters from this creature.

Kokusho, the Evening Star

Flying
When Kokusho dies, each opponent loses 5 life. You gain life equal to the life lost this way.

Dark Ritual

Dungeon Shade

Flying
{B}: This creature gets +1/+1 until end of turn.

Kagemaro, First to Suffer

Kagemaro's power and toughness are each equal to the number of cards in your hand.
{B}, Sacrifice Kagemaro: All creatures get -X/-X until end of turn, where X is the number of cards in your hand.

Keening Banshee

Flying
When this creature enters, target creature gets -2/-2 until end of turn.

Yargle, Glutton of Urborg

Disowned Ancestor

Outlast {1}{B} ({1}{B}, {T}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)

Kami of Empty Graves

Soulshift 3 (When this creature dies, you may return target Spirit card with mana value 3 or less from your graveyard to your hand.)

Mortal Combat

At the beginning of your upkeep, if twenty or more creature cards are in your graveyard, you win the game.

Gravewaker

Flying (This creature can't be blocked except by creatures with flying or reach.)
{5}{B}{B}: Return target creature card from your graveyard to the battlefield tapped.

Mischievous Poltergeist

Flying
Pay 1 life: Regenerate this creature.

Tormented Soul

This creature can't block and can't be blocked.

Plagued Rusalka

{B}, Sacrifice a creature: Target creature gets -1/-1 until end of turn.

Pestilent Spirit

Menace, deathtouch
Instant and sorcery spells you control have deathtouch. (Any amount of damage they deal to a creature is enough to destroy it.)

Sewerdreg

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Sacrifice this creature: Exile target card from a graveyard.