Whenever an opponent discards a card, this creature gets +2/+2 and gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

When this creature dies, each player sacrifices a creature of their choice.

Flying When this creature enters, exile target card from an opponent's graveyard. If it was a creature card, that player loses 1 life.

Mutate {3}{B} (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.) Menace (This creature can't be blocked except by two or more creatures.) Whenever this creature mutates, each opponent discards a card.

Mutate {4}{B} (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.) Whenever this creature mutates, each opponent sacrifices a creature of their choice.

When this creature enters, return target permanent to its owner's hand, then that player discards a card.

When this creature enters, exile another target creature. When this creature leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Flying Eerie — Whenever this creature or another enchantment you control enters and whenever you fully unlock a Room, tap up to one target creature and put a stun counter on it. Stun counters can't be removed from permanents your opponents control. (They won't untap if they have stun counters.)

When this creature enters, target opponent reveals their hand and you choose a nonland card from it. Exile that card. When this creature leaves the battlefield, return the exiled card to its owner's hand.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) At the beginning of your upkeep, you may move a +1/+1 counter from target creature onto this creature. Modular 3 (This creature enters with three +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) When this creature dies, each opponent loses 2 life.

When this creature dies, it deals 1 damage to any target and you gain 1 life.

Whenever this creature becomes blocked by a creature, that creature's controller loses 2 life and you gain 2 life.

Whenever an opponent casts or copies an instant or sorcery spell, they lose 1 life.

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

({T}: Add {U} or {B}.) This land enters tapped.

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

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {U}{B}.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {U} or {B}.

({T}: Add {U}.)

At the beginning of combat on your turn, if you both own and control this creature and a creature named Midnight Scavengers, exile them, then meld them into Chittering Host.

When this creature enters, exile up to two target cards from a single graveyard. When this creature leaves the battlefield, return the exiled cards to their owner's graveyard.

Menace When this creature enters, target opponent puts a deathtouch counter on a creature they control.

Flying When this creature enters, if you cast it from your hand, exile all cards from target opponent's hand. When this creature leaves the battlefield, return the exiled cards to their owner's hand.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) When this creature enters, exile target green or white creature an opponent controls. When this creature leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Whenever an enchantment you control is put into a graveyard from the battlefield, draw a card.

Reach Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.) As long as Doom Weaver is paired with another creature, each of those creatures has "When this creature dies, draw cards equal to its power."

Whenever a Swamp you control enters, choose one — • You draw a card and you lose 1 life. • This creature deals 2 damage to any target and you gain 2 life.

Flying Whenever this creature enters or attacks, draw a card, then discard a card. Threshold — This creature gets +1/+1 and has deathtouch as long as there are seven or more cards in your graveyard.

Whenever this creature deals combat damage to a player, draw that many cards.

Mutate {4}{B} (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.) Flying Whenever this creature mutates, exile the top card of each opponent's library face down. You may look at and play those cards for as long as they remain exiled.

Flying When this creature enters, target opponent discards a card and you draw a card.

Lifelink, haste

Each spell you cast that's a Demon, Horror, or Nightmare costs {1} less to cast. Whenever you cast a spell, if the amount of mana spent to cast it was less than its mana value, target opponent loses life equal to the difference.

Menace As an additional cost to cast black permanent spells, you may pay 2 life. Those spells cost {B} less to cast if you paid life this way. This effect reduces only the amount of black mana you pay. Whenever you cast a black permanent spell, target creature you control gets +1/+1 and gains menace until end of turn.

Commanders you control have menace and deathtouch. Partner (You can have two commanders if both have partner.)

Flying If damage would be dealt to you, prevent that damage and mill twice that many cards.

+1: Create a 2/3 blue and black Nightmare creature token with "Whenever this token attacks or blocks, each opponent exiles the top two cards of their library." −3: Return target nonland permanent to its owner's hand, then that player exiles a card from their hand. −7: You may cast up to three spells from among face-up cards your opponents own from exile without paying their mana costs.

+2: Exile the top three cards of target opponent's library. −X: Put a creature card with mana value X exiled with Ashiok onto the battlefield under your control. That creature is a Nightmare in addition to its other types. −10: Exile all cards from all opponents' hands and graveyards.

Horrors you control have menace. Whenever a Horror you control deals combat damage to a player, that player mills that many cards. At the beginning of your end step, choose target artifact or creature card in an opponent's graveyard that was put there from their library this turn. Put it onto the battlefield under your control.

Consuming Aberration's power and toughness are each equal to the number of cards in your opponents' graveyards. Whenever you cast a spell, each opponent reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.

Whenever one or more cards are put into your graveyard from your library, this creature gets +1/+1 until end of turn and can't be blocked this turn. {1}{U}{B}: Mill a card.

Flying, trample Pay 2 life: 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.)

Whenever a creature dealt damage by this creature this turn dies, return it to the battlefield under your control. That creature is a black Zombie in addition to its other colors and types.

Flying, lifelink This creature can't block. Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, you may return this card from your graveyard to your hand.

When this creature enters, you may return target creature card with mana value 3 or less from your graveyard to your hand. (Melds with Graf Rats.)