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.

Menace

Other enchantment creatures you control have menace.

Whenever Anikthea enters the battlefield or attacks, exile up to one target non-Aura enchantment card from your graveyard. Create a token that's a copy of that card, except it's a 3/3 black Zombie creature in addition to its other types.

You may have Body Double enter the battlefield as a copy of any creature card in a graveyard.

This spell costs less to cast if you have nine or more cards in your graveyard.

Flying

When Capricious Hellraiser enters the battlefield, exile three cards at random from your graveyard. Choose a noncreature, nonland card from among them and copy it. You may cast the copy without paying its mana cost.

You may have Clone enter the battlefield as a copy of any creature on the battlefield.

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

Haste

Nontoken creatures you control have ": Create a token that's a copy of target token you control that entered the battlefield this turn."

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

Science Teacher — Each Saga spell you cast has replicate. The replicate cost is equal to its mana cost. (When you cast that Saga, copy it for each time you paid its replicate cost. Copies of permanents enter the battlefield as tokens.)

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

You may have Lazotep Convert enter the battlefield as a copy of any creature card in a graveyard, except it's a 4/4 black Zombie in addition to its other colors and types.

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."

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.)

Changeling (This card is every creature type.)

You may have Moritte of the Frost enter the battlefield as a copy of a permanent you control, except it's legendary and snow in addition to its other types and, if it's a creature, it enters with two additional +1/+1 counters on it and has changeling.

( can be paid with either or 2 life.)

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

You may have Progenitor Mimic enter the battlefield 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."

Constellation — Whenever an enchantment enters the battlefield under your control, you may have Protean Thaumaturge become a copy of another target creature, except it has this ability.

Whenever another creature enters the battlefield under your control, you may have Renegade Doppelganger become a copy of that creature until end of turn. (If it does, it loses this ability for the rest of the turn.)

Vigilance

, : Create a tapped token that's a copy of target token that entered the battlefield this turn.

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

You may have Sakashima the Impostor enter the battlefield as a copy of any creature on the battlefield, except its name is Sakashima the Impostor, it's legendary in addition to its other types, and it has ": Return this creature to its owner's hand at the beginning of the next end step."

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

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

You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1/+1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)

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

You may have Undercover Operative enter the battlefield as a copy of any creature on the battlefield, except it enters with a shield counter on it if you control that creature. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

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

Plot (You may pay and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

You may have Wall of Stolen Identity enter the battlefield as a copy of any creature on the battlefield, except it's a Wall in addition to its other types and has defender. When you do, tap the copied creature and it doesn't untap during its controller's untap step for as long as you control Wall of Stolen Identity.