Flash

You may have Activated Sleeper enter as a copy of any creature card in a graveyard that was put there from the battlefield this turn, except it's a Phyrexian in addition to its other types.

This spell can't be countered.

You may have Altered Ego enter as a copy of any creature on the battlefield, except it enters with X additional +1/+1 counters on it.

Anthroplasm enters with two +1/+1 counters on it.

, : Remove all +1/+1 counters from Anthroplasm and put X +1/+1 counters on it.

: Until end of turn, Argivian Avenger gets -1/-1 and gains your choice of flying, vigilance, deathtouch, or haste.

Changeling (This card is every creature type.)

Flying

Whenever you cast a spell that's both red and white, Battlegate Mimic has base power and toughness 4/2 until end of turn and gains first strike until end of turn.

Changeling (This card is every creature type.)

As Bloodline Pretender enters, choose a creature type.

Whenever another creature you control of the chosen type enters, put a +1/+1 counter on Bloodline Pretender.

: Brightling gains vigilance until end of turn.

: Brightling gains lifelink until end of turn.

: Return Brightling to its owner's hand.

: Brightling gets +1/-1 or -1/+1 until end of turn.

Flash

Polymorphine — You may have Callidus Assassin enter tapped as a copy of any creature on the battlefield, except it has "When this creature enters, destroy up to one other target creature with the same name as this creature."

Changeling (This card is every creature type.)

Protection from black

: Chameleon Colossus gets +X/+X until end of turn, where X is its power.

Changeling (This card is every creature type.)

Champion a creature (When this enters, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)

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

Changeling (This card is every creature type.)

Vigilance

You may have Clever Impersonator enter as a copy of any nonland permanent on the battlefield.

Imprint — When Clone Shell enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom of your library in any order.

When Clone Shell dies, turn the exiled card face up. If it's a creature card, put it onto the battlefield under your control.

Devoid (This card has no color.)

As Corrupted Shapeshifter enters, it becomes your choice of a 3/3 creature with flying, a 2/5 creature with vigilance, or a 0/12 creature with defender.

Changeling (This card is every creature type.)

Exile target creature. Its controller creates a 1/1 colorless Shapeshifter creature token with changeling.

You may have Dack's Duplicate enter as a copy of any creature on the battlefield, except it has haste and dethrone. (Whenever it attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)

Flying

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Dermoplasm is turned face up, you may put a creature card with a morph ability from your hand onto the battlefield face up. If you do, return Dermoplasm to its owner's hand.

Flying

As Dracoplasm enters, sacrifice any number of creatures. Dracoplasm's power becomes the total power of those creatures and its toughness becomes their total toughness.

: Dracoplasm gets +1/+0 until end of turn.

Imprint — When Duplicant enters, you may exile target nontoken creature.

As long as a card exiled with Duplicant is a creature card, Duplicant has the power, toughness, and creature types of the last creature card exiled with Duplicant. It's still a Shapeshifter.

: Endling gains menace until end of turn.

: Endling gains deathtouch until end of turn.

: Endling gains undying until end of turn. (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

: Endling gets +1/-1 or -1/+1 until end of turn.

You may have Evil Twin enter as a copy of any creature on the battlefield, except it has ", : Destroy target creature with the same name as this creature."

Changeling (This card is every creature type.)

: Fire-Belly Changeling gets +1/+0 until end of turn. Activate no more than twice each turn.

, Discard a card: Put a +1/+1 counter on Flowstone Sculpture or Flowstone Sculpture gains flying, first strike, or trample. <I>(This effect lasts indefinitely.)</I>

Changeling (This card is every creature type.)

Trample

You may have Gigantoplasm enter as a copy of any creature on the battlefield, except it has ": This creature has base power and toughness X/X."

You may have Glasspool Mimic enter as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types.

: Greater Morphling gains your choice of banding, bushido 1, double strike, fear, flying, first strike, haste, landwalk of your choice, protection from a color of your choice, provoke, rampage 1, shadow, or trample until end of turn.

: Greater Morphling becomes the colors of your choice until end of turn.

: Greater Morphling becomes the creature type of your choice until end of turn.

: Greater Morphling's expansion symbol becomes the symbol of your choice until end of turn.

: Greater Morphling's art becomes by the artist of your choice until end of turn.

: Greater Morphling gets +2/-2 or -2/+2 until end of turn.

: Untap Greater Morphling.

At the beginning of your upkeep, change Halfdane's base power and toughness to the power and toughness of target creature other than Halfdane until the end of your next upkeep.

Whenever Identity Thief attacks, you may exile another target nontoken creature. If you do, Identity Thief becomes a copy of that creature until end of turn. Return the exiled card to the battlefield under its owner's control at the beginning of the next end step.

Changeling (This card is every creature type.)

When Irregular Cohort enters, create a 2/2 colorless Shapeshifter creature token with changeling.

You may have Jwari Shapeshifter enter as a copy of any Ally creature on the battlefield.

Whenever you commit a crime, put a +1/+1 counter on Lazav, Familiar Stranger. Then you may exile a card from a graveyard. If a creature card was exiled this way, you may have Lazav become a copy of that card until end of turn. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Whenever Lazav, Wearer of Faces attacks, exile target card from a graveyard, then investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Clue, you may have Lazav become a copy of a creature card exiled with it until end of turn.

Changeling (This card is every creature type.)

, , Exile a creature card from your graveyard: Put two +1/+1 counters on target creature. Activate only as a sorcery.

Flash

Flying

You may have Malleable Impostor enter as a copy of a creature an opponent controls, except it's a Faerie Shapeshifter in addition to its other types and it has flying.

You may have Mercurial Pretender enter as a copy of a creature you control, except it has ": Return this creature to its owner's hand."

Changeling (This card is every creature type.)

: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

Changeling (This card is every creature type.)

Flying

: Mistwalker gets +1/-1 until end of turn.

Changeling (This card is every creature type.)

: Moonglove Changeling gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy that creature.)

Changeling (This card is every creature type.)

As Morophon, the Boundless enters, choose a creature type.

Spells of the chosen type you cast cost less to cast. This effect reduces only the amount of colored mana you pay.

Other creatures you control of the chosen type get +1/+1.

Changeling (This card is every creature type.)

Tap an untapped creature you control: Mothdust Changeling gains flying until end of turn.

Whenever Nascent Metamorph attacks or blocks, target opponent reveals cards from the top of their library until they reveal a creature card. Nascent Metamorph becomes a copy of that card until end of turn. Then that player puts all cards revealed this way on the bottom of their library in a random order.

Changeling

Omnipresent Impostor has all card names.

As you search your library for one or more cards, you may choose Omnipresent Impostor as one of those cards. (For example, if you search for two land cards, you may find Omnipresent Impostor and a land card.)

Changeling

Whenever you cast an instant or sorcery spell, if it targets one or more other permanents you control, create a token that's a copy of one of those permanents.

When a spell or ability an opponent controls causes you to discard this card, create a token that's a copy of target permanent.

( can be paid with either or 2 life.)

You may have Phyrexian Metamorph enter as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.

As Primal Clay enters, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

You may have Progenitor Mimic enter as a copy of any creature on the battlefield, except it has "At the beginning of your upkeep, if this creature isn't a token, create a token that's a copy of this creature."

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Proteus Machine is turned face up, it becomes the creature type of your choice. (This effect lasts indefinitely.)

Changeling (This card is every creature type.)

As Realmwalker enters, choose a creature type.

You may look at the top card of your library any time.

You may cast creature spells of the chosen type from the top of your library.