Flying When this creature enters, put up to one target instant or sorcery card from your graveyard on top of your library.

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

When this creature enters, it deals X damage to target creature or planeswalker an opponent controls, where X is the number of creature cards in your graveyard.

Pestilence Rats's power is equal to the number of other Rats on the battlefield. (For example, as long as there are two other Rats on the battlefield, Pestilence Rats's power and toughness are 2/3.)

Skulk (This creature can't be blocked by creatures with greater power.) Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

This creature gets +1/+1 for each other creature on the battlefield named Relentless Rats. A deck can have any number of cards named Relentless Rats.

Swarm of Rats's power is equal to the number of Rats you control.

As an additional cost to cast this spell, sacrifice a creature. Draw two cards.

As an additional cost to cast this spell, sacrifice an artifact or creature. Draw two cards and create a Map token. (It's an artifact with "{1}, {T}, Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")

Put any number of target creature cards from your graveyard on top of your library. Draw a card.

Destroy target creature that was dealt damage this turn. Draw a card.

Up to one target creature gets -1/-1 until end of turn. You create a 1/1 black Rat creature token with "This token can't block."

As an additional cost to cast this spell, sacrifice an artifact or creature. You gain life equal to the sacrificed permanent's mana value. Draw two cards.

As an additional cost to cast this spell, sacrifice a creature. Draw two cards.

This land enters tapped. {T}: Add {B}. Cycling {B} ({B}, Discard this card: Draw a card.)

This land enters tapped. {T}: Add {B}. Cycling {1}{B} ({1}{B}, Discard this card: Draw a card.)

{T}: Add {C}. {T}: Choose target commander that entered this turn. Put a +1/+1 counter on it if it's a creature and a loyalty counter on it if it's a planeswalker.

This land enters tapped. When this land enters, you may put target creature card from your graveyard on top of your library. {T}: Add {B}.

This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

This land enters tapped. When this land enters, target player loses 1 life. {T}: Add {B}.

This land enters tapped. {T}: Add {B}. Cycling {2} ({2}, Discard this card: Draw a card.)

{T}: Add {C}. {1}, {T}: Add one mana of any color. When you spend this mana to cast your commander, scry X, where X is the number of times it's been cast from the command zone this game.

({T}: Add {B}.)

This land enters tapped. {T}: Add {B}. {1}{B}, {T}, Sacrifice this land: Draw a card.

Put any number of target creature cards from your graveyard on top of your library. Draw a card.

You draw two cards and you lose 2 life.

Exile X target cards from a single graveyard.

Target player draws two cards and loses 2 life.

Destroy target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)