Demon's Den

Creature — Merfolk Shaman

Other Merfolk you control get +1/+1.

Creature — Merfolk Mutant

Flying When this creature enters, put a +1/+1 counter on target creature you control. {3}{G}{U}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Legendary Creature — Halfling Citizen

Whenever one or more Halflings you control attack a player, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")

Creature — Merfolk Soldier

Other Merfolk creatures you control get +1/+1. Whenever you cast a Merfolk spell, you may tap or untap target permanent.

Creature — Merfolk Soldier

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Flying, vigilance When this creature enters, create a 1/1 white and blue Merfolk creature token.

Legendary Creature — Halfling Advisor

Partner with Pippin, Warden of Isengard (When this creature enters, target player may put Pippin into their hand from their library, then shuffle.) Whenever one or more artifacts you control enter, create a 1/1 white Soldier creature token with lifelink. This ability triggers only once each turn.

Creature — Human Druid

Whenever you cast an enchantment spell, you may draw a card.

Creature — Cat

During turns other than yours, this creature gets +0/+2.

Creature — Unicorn

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Enchantment — Aura

Enchant creature When this Aura enters, tap enchanted creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) Enchanted creature doesn't untap during its controller's untap step.

Creature — Bird Scout

Flying When this creature enters, create a Clue token. (It's an artifact with "{2}, Sacrifice this token: Draw a card.") This creature gets +2/+0 as long as you've drawn two or more cards this turn.

Legendary Artifact Creature — Robot Turtle

When Metalhead enters, return up to one other target artifact or creature to its owner's hand. {R}, Sacrifice another artifact: Put a +1/+1 counter on Metalhead. He gains menace and haste until end of turn.

Artifact Creature — Shapeshifter

As this creature enters, choose a creature type. This creature is the chosen type in addition to its other types. Each other creature you control of the chosen type enters with an additional +1/+1 counter on it.

Instant

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Counter target spell unless its controller pays {3}.

Instant

Spree (Choose one or more additional costs.) + {1} — Until end of turn, target creature becomes a white Rabbit with base power and toughness 0/1. + {3} — Target player draws two cards.

Sorcery

As an additional cost to cast this spell, sacrifice a creature. Add X mana of any one color, where X is 1 plus the sacrificed creature's mana value. Spend this mana only to cast creature spells.

Artifact Creature — Golem

When this creature enters, destroy target nonland permanent an opponent controls.

Artifact — Equipment

Equipped creature gets +4/+0 and has trample. Equip {4} Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Artifact — Equipment

When this Equipment enters, destroy target permanent. Equipped creature gets +3/+3. Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Creature — Djinn Artificer

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Enchantment

{2}{W}: Return target permanent you control to its owner's hand. If it has unearth, instead exile it, then return that card to its owner's hand. Activate only during your turn.

Creature — Demon

Flying When this creature enters, you may discard any number of cards. When you do, up to that many target creatures each get -2/-2 until end of turn.

Legendary Creature — Human Artificer

Ward—Pay 3 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3 life.) Whenever you cast an instant or sorcery spell, you may sacrifice an artifact. If you do, copy that spell and you may choose new targets for the copy.

Legendary Creature — Mutant Ninja Turtle

Disappear — At the beginning of your end step, if a permanent left the battlefield under your control this turn, put a +1/+1 counter on Michelangelo.

Legendary Creature — Mutant Ninja Turtle

Each creature you control with a counter on it can't be blocked by more than one creature. Whenever Michelangelo enters or attacks, create a Mutagen token. (It's an artifact with "{1}, {T}, Sacrifice this token: Put a +1/+1 counter on target creature. Activate only as a sorcery.")

Creature — Human Wizard

When this creature enters, you may search your library for an instant or sorcery card with mana value 1, reveal it, put it into your hand, then shuffle.

Creature — Vampire Assassin

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

Creature — Human Soldier

Whenever another creature enters, untap this creature.

Artifact — Vehicle

During turns other than yours, this Vehicle is an artifact creature. Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)

Sorcery

Create three 1/1 red Gremlin creature tokens. Gremlins you control gain menace, lifelink, and haste until end of turn. (A creature with menace can't be blocked except by two or more creatures.)

Enchantment

Raid — At the beginning of your end step, if you attacked this turn, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") {2}{B}, Sacrifice this enchantment: Target opponent loses X life, where X is the amount of life you gained this turn.

Instant

Mill four cards, then you may return a permanent card from among them to your hand. (To mill four cards, put the top four cards of your library into your graveyard.)

Instant

Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.) Target creature gets +3/+3 until end of turn. If this spell was kicked, that creature gets +5/+5 until end of turn instead.

Enchantment

At the beginning of combat on your turn, target creature you control gets +2/+0 and gains vigilance until end of turn.

Instant

Target creature gets +1/+1 until end of turn for each creature you control.

Instant

Target creature gains trample until end of turn. It also gets +1/+0 until end of turn if you control a Mouse. Draw a card.

Instant

Target creature gets +2/+2 and gains flying until end of turn.

Creature — Mutant Rebel

When this creature enters, create a 2/2 red Mutant creature token. Alliance — Whenever another creature you control enters, put a +1/+1 counter on target creature you control.

Legendary Creature — Phyrexian Beast

Migloz enters with five oil counters on it. {1}, Remove an oil counter from Migloz: It gains vigilance and menace until end of turn. {2}, Remove two oil counters from Migloz: It gets +2/+2 until end of turn. {3}, Remove three oil counters from Migloz: Destroy target artifact or enchantment.

Creature — Dinosaur

Reach When this creature enters, you gain 4 life. Cycling {2} ({2}, Discard this card: Draw a card.)

Sorcery

Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle. Cycling {2} ({2}, Discard this card: Draw a card.)

Creature — Beast

Mutate {2}{G} (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, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Creature — Human

{3}{G}: This creature becomes a Werewolf. Put two +1/+1 counters on it and you draw a card. Activate only once.

Creature — Human Soldier

Vigilance (Attacking doesn't cause this creature to tap.) When this creature enters, look at the top four cards of your library. You may reveal a creature card with power 2 or less from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Artifact Creature — Construct

{T}, Mill a card: Add {C}. (To mill a card, put the top card of your library into your graveyard.)

Artifact — Equipment

When this Equipment enters, attach it to target creature you control. Equipped creature gets +1/+0. It gets +3/+1 instead as long as an opponent has eight or more cards in their graveyard. Equip {2}{B}

Enchantment — Aura

Enchant creature You control enchanted creature.

Sorcery

Target opponent discards two cards, mills a card, and loses 1 life. You gain 1 life. (To mill a card, a player puts the top card of their library into their graveyard.)

Creature — Rat Warlock

Threshold — As long as there are seven or more cards 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.)

Instant

Buyback {2}{U} (You may pay an additional {2}{U} as you cast this spell. If you do, put this card into your hand as it resolves.) Tap target artifact, creature, or land.