Mirrorweave 
Instant
$1.18 #13954 0.40 18.5 years
Each other creature becomes a copy of target nonlegendary creature until end of turn.
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Cards similar to Mirrorweave expected a card that isn't here?
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Cytoshape91%
$0.48↓#26622↓0.13↓20.5 years↑
"Choose a nonlegendary creature on the battlefield. Target creature becomes a copy of that creature until end of turn."
Nanogene Conversion86%
$9.77↑#4561↑0.14↓3.0 years↓
"Choose target creature you control. Each other creature becomes a copy of that creature until end of turn, except it isn't legendary."
Polymorphous Rush82%
$0.21↓#21623↓0.05↓12.5 years↓
"Choose a creature on the battlefield. Any number of target creatures you control each become a copy of that creature until end of turn."
Tilonalli's Skinshifter82%
$0.21↓#23689↓0.17↓9.1 years↓
"Whenever this creature attacks, it becomes a copy of another target nonlegendary attacking creature until end of turn."
Augmenter Pugilist // Echoing Equation80%
$0.32↓#11147↑0.25↓5.5 years↓
"Choose target creature you control. Each other creature you control becomes a copy of it until end of turn, except those creatures aren't legendary."
Loki, Lord of Misrule80%
$41.48↑#10965↑0.72↑0.3 years↓
"
, 
: Choose target creature you control. Each creature you control other than the chosen creature becomes a copy of that creature until end of turn, except it isn't legendary. Activate only as a sorcery."
, : Choose target creature you control. Each creature you control other than the chosen creature becomes a copy of that creature until end of turn, except it isn't legendary. Activate only as a sorcery."
Metamorphic Alteration79%
$0.35↓#146510.06↓8.3 years↓
"Enchanted creature is a copy of the chosen creature."
Cryptoplasm79%
$0.64↓#129380.4415.7 years↓
"At the beginning of your upkeep, you may have this creature become a copy of another target creature, except it has this ability."
Sakashima's Will76%
$0.40↓#8920↑0.20↓5.9 years↓
"• Choose a creature you control. Each other creature you control becomes a copy of that creature until end of turn."
True Polymorph76%
$0.22↓#17413↓0.375.2 years↓
"Target artifact or creature becomes a copy of another target artifact or creature."
Cemetery Puca75%
$2.76↑#19936↓0.07↓18.5 years
"Whenever a creature dies, you may pay 
. If you do, this creature becomes a copy of that creature, except it has this ability."
. If you do, this creature becomes a copy of that creature, except it has this ability."
Mirror of the Forebears74%
$1.81↑#10612↑0.12↓9.2 years↓
": Until end of turn, this artifact becomes a copy of target creature you control of the chosen type, except it's an artifact in addition to its other types."
: Until end of turn, this artifact becomes a copy of target creature you control of the chosen type, except it's an artifact in addition to its other types."
Shameless Charlatan74%
$0.24↓#20900↓0.06↓4.4 years↓
"Commander creatures you own have ": This creature becomes a copy of another target creature.""
: This creature becomes a copy of another target creature.""
Infinite Reflection73%
$0.24↓#17784↓0.12↓14.5 years↓
"When this Aura enters attached to a creature, each other nontoken creature you control becomes a copy of that creature."
Silent Hallcreeper72%
$1.19↑#1442↑0.27↓2.1 years↓
"• This creature becomes a copy of another target creature you control."
Taskmaster, Mercenary Mimic71%
$0.67↓#8457↑0.350.3 years↓
"At the beginning of your first main phase, until your next turn, this card becomes a copy of up to one target creature on the battlefield or creature card in a graveyard, except his name is this card and he's a legendary Human Mercenary Villain creature."
Artisan of Forms71%
$0.20↓#17065↓0.05↓13.1 years↓
"Whenever you cast a spell that targets this creature, you may have this creature become a copy of target creature, except it has this ability."
Shadow Kin71%
$0.69↓#8120↑0.26↓5.1 years↓
"At the beginning of your upkeep, each player mills three cards. You may exile a creature card from among the cards milled this way. If you do, this creature becomes a copy of that card, except it has this ability."
Shapesharer70%
$4.48↑#9204↑0.3619.0 years
": Target Shapeshifter becomes a copy of target creature until your next turn."
: Target Shapeshifter becomes a copy of target creature until your next turn."
Permeating Mass70%
$0.34↓#18412↓0.25↓10.2 years↓
"Whenever this creature deals combat damage to a creature, that creature becomes a copy of this creature."