Flash

You may have Activated Sleeper enter the battlefield 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.

Except for creatures named Akron Legionnaire and artifact creatures, creatures you control can't attack.

This spell can't be countered.

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

Heroic — Whenever you cast a spell that targets Artisan of Forms, you may have Artisan of Forms become a copy of target creature, except it has this ability.

You may have Auton Soldier enter the battlefield as a copy of any creature on the battlefield, except it isn't legendary, is an artifact in addition to its other types, and has myriad. (Whenever it attacks, for each opponent other than defending player, you may put a token that's a copy of this creature onto the battlefield tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

When Blood Sun enters the battlefield, draw a card.

All lands lose all abilities except mana abilities.

Flash

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

Cephalid Facetaker can't be blocked.

At the beginning of combat on your turn, you may have Cephalid Facetaker become a copy of another target creature until end of turn, except it's 1/4 and has "This creature can't be blocked."

Enchant creature

Enchanted creature has phasing and can't be blocked except by Walls. (It phases in or out before its controller untaps during each of their untap steps. While it's phased out, it's treated as though it doesn't exist.)

When Court of Vantress enters the battlefield, you become the monarch.

At the beginning of your upkeep, choose up to one other target enchantment or artifact. If you're the monarch, you may create a token that's a copy of it. If you're not the monarch, you may have Court of Vantress become a copy of it, except it has this ability.

At the beginning of your upkeep, you may have Cryptoplasm become a copy of another target creature, except it has this ability.

Whenever Curie, Emergent Intelligence deals combat damage to a player, draw cards equal to its base power.

, Exile another nontoken artifact creature you control: Curie becomes a copy of the exiled creature, except it has "Whenever this creature deals combat damage to a player, draw cards equal to its base power."

When Cyclone Summoner enters the battlefield, if you cast it from your hand, return all permanents to their owners' hands except for Giants, Wizards, and lands.

Deathcult Rogue can't be blocked except by Rogues.

Whenever Delina, Wild Mage attacks, choose target creature you control, then roll a d20.

1–14 | Create a tapped and attacking token that's a copy of that creature, except it's not legendary and it has "At end of combat, exile this creature."

15–20 | Create one of those tokens. You may roll again.

When Departed Deckhand becomes the target of a spell, sacrifice it.

Departed Deckhand can't be blocked except by Spirits.

: Another target creature you control can't be blocked this turn except by Spirits.

: Exile target creature card from a graveyard. Dimir Doppelganger becomes a copy of that card, except it has this ability.

, , Exile a creature card from your graveyard: Create a token that's a copy of the exiled card, except it's a 0/0 Construct artifact in addition to its other types and it has "This creature gets +1/+1 for each Construct you control." It gains haste until end of turn. Activate only as a sorcery.

Copy target creature spell you control, except it isn't legendary if the spell is legendary. (A copy of a creature spell becomes a token.)

Dread Warlock can't be blocked except by black creatures.

You may have Echoing Deeps enter the battlefield tapped as a copy of any land card in a graveyard, except it's a Cave in addition to its other types.

: Add .

+2: You gain 1 life for each creature you control.

−2: Create three 1/1 white Soldier creature tokens.

−5: Destroy all other permanents except for lands and tokens.

You may have Estrid's Invocation enter the battlefield as a copy of an enchantment you control, except it has "At the beginning of your upkeep, you may exile this enchantment. If you do, return it to the battlefield under its owner's control."

Non-Eye creatures you control can't attack.

Evil Eye of Orms-by-Gore can't be blocked except by Walls.

When Eye of Singularity enters the battlefield, destroy each permanent with the same name as another permanent, except for basic lands. They can't be regenerated.

Whenever a permanent other than a basic land enters the battlefield, destroy all other permanents with that name. They can't be regenerated.

Inspired — Whenever Felhide Spiritbinder becomes untapped, you may pay . If you do, create a token that's a copy of another target creature, except it's an enchantment in addition to its other types. It gains haste. Exile it at the beginning of the next end step.

You may have Flesh Duplicate enter the battlefield as a copy of any creature on the battlefield, except it has vanishing 3 if that creature doesn't have vanishing. (A permanent with vanishing 3 enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

Enchant creature

At the beginning of your upkeep, create a token that's a copy of enchanted creature, except it's a Spirit in addition to its other types.

If Ghastly Mimicry would be put into a graveyard from anywhere, exile it instead.

Haste

: Gingerbrute can't be blocked this turn except by creatures with haste.

, , Sacrifice Gingerbrute: You gain 3 life.

At the beginning of combat on your turn, you may exile a creature card from your graveyard. If you do, create a token that's a copy of that card, except it's a 4/4 black Zombie. It gains haste until end of turn.

Guile can't be blocked except by three or more creatures.

If a spell or ability you control would counter a spell, instead exile that spell and you may play that card without paying its mana cost.

When Guile is put into a graveyard from anywhere, shuffle it into its owner's library.

Create a token that's a copy of target creature, except it has haste and "At the beginning of the end step, exile this permanent."

Multi-threat Eliminator — Hexmark Destroyer can't be blocked except by six or more creatures.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Exile X target creature cards from your graveyard. For each card exiled this way, create a token that's a copy of that card, except it's a 4/4 black Zombie.

Flash

If an opponent would draw a card except the first one they draw in each of their draw steps, instead you create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Equipped creature gets +1/+1.

Whenever Inchblade Companion becomes attached to a creature, create a token that's a copy of Inchblade Companion, except it doesn't have this ability. This ability triggers only once each turn.

Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Prevent all combat damage that would be dealt this turn except combat damage that would be dealt by enchanted creatures and enchantment creatures. Scry 2.

+1: Whenever one or more creatures you control deal combat damage to a player this turn, draw a card, then discard a card.

−2: Create a 2/2 blue Illusion creature token with "When this creature becomes the target of a spell, sacrifice it."

−5: Create two tokens that are copies of Jace, Cunning Castaway, except they're not legendary.

, : Target creature can't be blocked this turn except by Walls.

Haste

: Create a token that's a copy of target nonlegendary creature you control, except it has haste. Sacrifice it at the beginning of the next end step.

When Lazav, the Multifarious enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

: Lazav, the Multifarious becomes a copy of target creature card in your graveyard with mana value X, except its name is Lazav, the Multifarious, it's legendary in addition to its other types, and it has this ability.

Whenever an opponent draws a card except the first one they draw in each of their draw steps, put a +1/+1 counter on Leela, Sevateem Warrior.

Doctor's companion (You can have two commanders if the other is the Doctor.)

Enchant land

When Loose in the Park enters the battlefield, draw a card, then draft a card from Loose in the Park's spellbook and exile it.

: Until end of turn, enchanted land becomes a copy of the exiled card, except it's a land in addition to its other types and it has haste.

, , Discard two cards: Destroy all creatures except for Mageta the Lion. Those creatures can't be regenerated.

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

Whenever a nontoken creature enters the battlefield under your control, you may pay . If you do, create a token that's a copy of that creature, except it has haste and "At the beginning of the end step, sacrifice this permanent."

As Mirror of the Forebears enters the battlefield, choose a creature type.

: Until end of turn, Mirror of the Forebears becomes a copy of target creature you control of the chosen type, except it's an artifact in addition to its other types.

You may have Mirrorhall Mimic enter the battlefield as a copy of any creature on the battlefield, except it's a Spirit in addition to its other types.

Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

: Mizzium Transreliquat becomes a copy of target artifact until end of turn.

: Mizzium Transreliquat becomes a copy of target artifact, except it has this ability.