In a land of undeath, permanent pest control solutions are few and far between.

Engine Rat

Deathtouch
{5}{B}: Each opponent loses 2 life.

Nashi, Searcher in the Dark

Menace
Whenever Nashi deals combat damage to a player, you mill that many cards. You may put any number of legendary and/or enchantment cards from among them into your hand. If you put no cards into your hand this way, put a +1/+1 counter on Nashi.

Innocuous Rat

Manifest

When this creature dies, manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.)

Relentless Rats

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.

Bottom feeders sometimes rise to the top.

Chittering Rats

When this creature enters, target opponent puts a card from their hand on top of their library.

"Should we act now or later?" the rat asked. "Both," whispered the squirrel.

Daggerfang Duo

Deathtouch
When this creature enters, you may mill two cards. (You may put the top two cards of your library into your graveyard.)

Marrow-Gnawer

They don't follow orders. They follow him.

All Rats have fear.
{T}, Sacrifice a Rat: Create X 1/1 black Rat creature tokens, where X is the number of Rats you control.

Ink-Eyes, Servant of Oni

Ninjutsu {3}{B}{B} ({3}{B}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Ink-Eyes deals combat damage to a player, you may put target creature card from that player's graveyard onto the battlefield under your control.
{1}{B}: Regenerate Ink-Eyes.

Many rats have found their minds while lost in the mud-slicked gyre of a snail shell.

Thought Shucker

Threshold — {1}{U}: Put a +1/+1 counter on this creature and draw a card. Activate only if seven or more cards are in your graveyard and only once.

A water skimmer's ability to sense danger in the slightest ripple makes them a prized companion for Long River trawlers.

Shoreline Looter

This creature can't be blocked.
Threshold — Whenever this creature deals combat damage to a player, draw a card. Then discard a card unless seven or more cards are in your graveyard.

He etches his secrets onto the shimmering shells of mussels, saving them to share with the Great Snail.

Nightwhorl Hermit

Vigilance
Threshold — As long as seven or more cards are in your graveyard, this creature gets +1/+0 and can't be blocked.

Mindwhisker

At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Threshold — As long as seven or more cards are in your graveyard, creatures your opponents control get -1/-0.

Each of them is a bad influence on the rest.

For every five you see, there are fifty you don't.

Rat Colony

This creature gets +1/+0 for each other Rat you control.
A deck can have any number of cards named Rat Colony.

"Lightning and snail as one!" cried the rat. "It's so beautiful!" the otter gasped in awe.

Lightshell Duo

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When this creature enters, 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.)

Tax Taker

Whenever an opponent pays a tax from a spell or permanent you control, create a number of Treasure tokens equal to the amount of mana they paid. (This happens each time a spell you control or an ability of a permanent you control causes an opponent to pay extra mana. Cards that can tax opponents include Mana Tithe, Esper Sentinel, and Ghostly Prison.)

Azure Beastbinder

Vigilance
This creature can't be blocked by creatures with power 2 or greater.
Whenever this creature attacks, up to one target artifact, creature, or planeswalker an opponent controls loses all abilities until your next turn. If it's a creature, it also has base power and toughness 2/2 until your next turn.

Vren, the Relentless

Ward {2}
If a creature an opponent controls would die, exile it instead.
At the beginning of each end step, create X 1/1 black Rat creature tokens with "This token gets +1/+1 for each other Rat you control," where X is the number of creatures that were exiled under your opponents' control this turn.

Snail

Wick, the Whorled Mind

Whenever Wick or another Rat you control enters, create a 1/1 black Snail creature token if you don't control a Snail. Otherwise, put a +1/+1 counter on a Snail you control.
{U}{B}{R}, Sacrifice a Snail: Wick deals damage equal to the sacrificed creature's power to each opponent. Then draw cards equal to the sacrificed creature's power.

"The same tides that bring us knowledge can sweep us away."

Tidecaller Mentor

Menace
Threshold — When this creature enters, if seven or more cards are in your graveyard, return up to one target nonland permanent to its owner's hand.

"If only you kept your secrets somewhere more secure than your delicate little skull."

Mind Drill Assailant

Threshold — As long as seven or more cards are in your graveyard, this creature gets +3/+0.
{2}{U/B}: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Insatiable Frugivore

Food

When this creature enters, create a Food token, then you may exile three cards from your graveyard. If you do, repeat this process.
{3}{B}, Sacrifice X Foods: Creatures you control get +X/+0 and gain menace until end of turn.

Thornplate Intimidator

When this creature enters, target opponent loses 3 life unless they sacrifice a nonland permanent or discard a card.
(This token's mana cost is {3}{B}.)

This creature gets +1/+1 for each other Rat you control.

"What a hideous creature! And the worm's no looker either."
—Grumble, rival marshstalker

Wick's Patrol

When this creature enters, mill three cards. When you do, target creature an opponent controls gets -X/-X until end of turn, where X is the greatest mana value among cards in your graveyard.

Offspring {3} (You may pay an additional {3} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
When this creature enters, target opponent loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card.

Persistent Marshstalker

This creature gets +1/+0 for each other Rat you control.
Threshold — Whenever you attack with one or more Rats, if seven or more cards are in your graveyard, you may pay {2}{B}. If you do, return this card from your graveyard to the battlefield tapped and attacking.

If you provoke them, they grow malicious.

Genku, Future Shaper

When her beloved pet died, the artificer turned to necromancy.

Refurbished Familiar

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying
When this creature enters, each opponent discards a card. For each opponent who can't, you draw a card.

Greasefang, Okiba Boss

At the beginning of combat on your turn, return target Vehicle card from your graveyard to the battlefield. It gains haste. Return it to its owner's hand at the beginning of your next end step.

Nezumi Linkbreaker

Mercenary

"If they want to get to Prosperity so badly, they can walk there."

When this creature dies, create a 1/1 red Mercenary creature token with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."

Ruthless Radrat

Copy

Squad—Exile four cards from your graveyard. (As an additional cost to cast this spell, you may pay its squad cost any number of times. When this creature enters, create that many tokens that are copies of it.)
Menace (This creature can't be blocked except by two or more creatures.)

Impressive Rat

When Impressive Rat dies, put a hole counter on target land you don't control. Whenever that land becomes tapped, you investigate. (The land continues to intrigue.)

If you exalt them, they grow splendiferous.

Pack Rat

Pack Rat's power and toughness are each equal to the number of Rats you control.
{2}{B}, Discard a card: Create a token that's a copy of this creature.

If you embolden them, they grow ambitious.

"Rodents of Unusual Size? I don't think they exist."
—Westley

Lord Skitter's Butcher

When this creature enters, choose one —
• Create a 1/1 black Rat creature token with "This token can't block."
• You may sacrifice another creature. If you do, scry 2, then draw a card.
• Creatures you control gain menace until end of turn.

Lord Skitter, Sewer King

Whenever another Rat you control enters, exile up to one target card from an opponent's graveyard.
At the beginning of combat on your turn, create a 1/1 black Rat creature token with "This token can't block."

Gnawing Crescendo

Rat Out

Tangled Colony

Ogre Chitterlord

Song of Totentanz

Experimental Confectioner

Voracious Vermin

Twisted Sewer-Witch

Warehouse Tabby

Redcap Gutter-Dweller

Totentanz, Swarm Piper

Harried Spearguard

Ratcatcher Trainee // Pest Problem

Edgewall Pack

This creature can't block.
When this creature dies, create X 1/1 black Rat creature tokens with "This token can't block," where X is the amount of damage dealt to it this turn.

Old Flitterfang

Flying
At the beginning of each end step, if a creature died this turn, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")
{2}{B}, Sacrifice another creature or artifact: Old Flitterfang gets +2/+2 until end of turn.

Lord Skitter promised the starving rats of Edgewall that they would never go hungry again.

When this creature enters, create a 1/1 black Rat creature token with "This token can't block."
Whenever another creature you control dies, put a +1/+1 counter on this creature.

If you nourish them, they grow calamitous.

Nashi, Moon's Legacy

Menace, ward {1}
Whenever Nashi attacks, exile up to one target legendary or Rat card from your graveyard and copy it. You may cast the copy. (You still pay its costs. A copy of a permanent spell becomes a token.)

"Tell Boss Umezawa there's a new gang moving in on our territory. I'm forwarding their insignia. Watch for it elsewhere."

Nezumi Informant

When this creature enters, each opponent discards a card.

Poison Counter

Karumonix, the Rat King

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Other Rats you control have toxic 1.
When Karumonix enters, look at the top five cards of your library. You may reveal any number of Rat cards from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in a random order.

What cannot be remade will be unmade, one scrap at a time.

Chittering Skitterling

Corrupted — Sacrifice an artifact or creature: Draw a card. Activate only if an opponent has three or more poison counters and only once each turn.

Blightbelly Rat

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
When this creature dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

You know you've ventured too deep when the rats stop running and hold their ground.

Ossuary 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.

Ashcoat of the Shadow Swarm

Whenever Ashcoat attacks or blocks, other Rats you control get +X/+X until end of turn, where X is the number of Rats you control.
At the beginning of your end step, you may mill four cards. If you do, return up to two Rat creature cards from your graveyard to your hand. (To mill a card, put the top card of your library into your graveyard.)

"The old ways still work, but a little tech support never hurts."

Nezumi Bone-Reader

{B}, Sacrifice a creature: Target player discards a card. Activate only as a sorcery.

"Everyone warns about the sand and the food, but the rats are worse than both put together!"
—Sanwell, letter to his family

Gnawing Vermin

When this creature enters, target player mills two cards.
When this creature dies, target creature you don't control gets -1/-1 until end of turn.

Nashi, Moon Sage's Scion

A-Nashi, Moon Sage's Scion

Ninjutsu {3}{B} ({3}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Nashi deals combat damage to a player, exile the top card of each player's library. Until end of turn, you may play one of those cards. If you cast a spell this way, pay life equal to its mana value rather than paying its mana cost.

While the gremlin, beeble, and squirrel infestations wreaked havoc on the park, Roxi was able to spin the numerous rat colonies as a "robust recycling program."

Rat in the Hat

{T}, Sacrifice this creature: Until end of turn, you may cast target creature card that has a hat from your graveyard.

Wave of Rats

Trample
When this creature dies, if it dealt combat damage to a player this turn, return it to the battlefield under its owner's control.
Blitz {4}{B} (If you cast this spell for its blitz cost, it gains haste and "When this creature dies, draw a card." Sacrifice it at the beginning of the next end step.)

Silver-Fur Master

A-Silver-Fur Master

Ninjutsu {U}{B} ({U}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Ninjutsu abilities you activate cost {1} less to activate.
Other Ninja and Rogue creatures you control get +1/+1.

Rat Rogue

Tribute to Horobi // Echo of Death's Wail

Nezumi Prowler

A-Nezumi Prowler

Ninjutsu {1}{B} ({1}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
When this creature enters, target creature you control gains deathtouch and lifelink until end of turn.

Mukotai Ambusher

Ninjutsu {1}{B} ({1}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Lifelink

Nezumi Bladeblesser

This creature has deathtouch as long as you control an artifact.
This creature has menace as long as you control an enchantment. (It can't be blocked except by two or more creatures.)

It's hard to say which is more deadly: her bike or her bite.

"It's not one or the other, kami or technology. Both offer power. I will not limit myself."

The Mukotai Reckoners specialize in stealth and subterfuge.

No matter how crowded the den, everyone's welcome to squeak in for the festivities.

A procession of gifts with no end in sight.

A sumptuous feast with friends starts the new year off on a good paw.

Ogre Slumlord

Revenge of the Rats

Mad Ratter

Chittering Witch

Piper of the Swarm

Lab Rats

Plague of Vermin

"Even rats hoard their treasures. Are your precious things so different?"
—Izoni

Burglar Rat

Wreckage from the Phyrexian Invasion provided the rats with a seemingly unlimited number of breeding grounds.

Dirty Rat

When this creature enters, target opponent discards a card.

Hungry Lynx

From every shadow came the dull scratch of teeth on bones.

Ruin Rat

Deathtouch
When this creature dies, exile target card from an opponent's graveyard.

Thriving Rats

Energy Reserve

In Ghirapur, even the lowliest residents live in lavish surroundings.

When this creature enters, you get {E}{E} (two energy counters).
Whenever this creature attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it.

Sinuous Vermin

{3}{B}{B}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
As long as this creature is monstrous, it has menace. (It can't be blocked except by two or more creatures.)

Midnight Scavengers

Eldritch Moon Checklist

Chittering Host

Graf Rats

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.

"They're in the walls! Can't you hear them?"

Rancid Rats

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.)

When Tasigur sent his ambassadors to the Abzan outpost, the true envoys were not the naga but the infectious rats they carried with them.

Typhoid Rats

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

Upon finding his warehouse infested, Gaven didn't know whether to get an exterminator or an exorcist.

Gutter Skulk

When times are tough, the poor eat the rats. When times are tougher, the rats eat the poor.

Drainpipe Vermin

When this creature dies, you may pay {B}. If you do, target player discards a card.

The Rats ofMagic the Gathering

Engine Rat

Aetherdrift

Nashi, Searcher in the Dark

Duskmourn: House of Horror

Nashi, Searcher in the Dark

Duskmourn: House of Horror

Innocuous Rat

Duskmourn: House of Horror

Relentless Rats

Secret Lair Drop

Chittering Rats

The List

Daggerfang Duo

Bloomburrow

Marrow-Gnawer

Bloomburrow Commander

Ink-Eyes, Servant of Oni

Bloomburrow Commander

Thought Shucker

Bloomburrow

Shoreline Looter

Bloomburrow

Nightwhorl Hermit

Bloomburrow