Mocking Doppelganger {3}{U}
Creature — Shapeshifter
Flash
You may have this creature enter as a copy of a creature an opponent controls, except it has "Other creatures with the same name as this creature are goaded." (They attack each combat if able and attack a player other than you if able.)
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Body Double 92%
$0.31#6056
"You may have this creature enter as a copy of any creature card in a graveyard."
Hulking Metamorph 89%
$0.18#7907
"You may have this creature enter as a copy of an artifact or creature you control, except it's an artifact creature in addition to its other types, and its power and toughness are equal to this creature's power and toughness."
Visage Bandit 89%
$0.22#7472
"You may have this creature enter as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types."
Glasspool Mimic // Glasspool Shore 89%
$6.45#1180
"You may have this creature enter as a copy of a creature you control, except it's a Shapeshifter Rogue in addition to its other types."
Waxen Shapethief 89%
$0.38#6388
"You may have this creature enter as a copy of an artifact or creature you control."
+1 more matching line
Sakashima's Protege 88%
$0.45#5882
"You may have this creature enter as a copy of any permanent that entered this turn."
+1 more matching line
Renegade Doppelganger 88%
$0.50#19450
"Whenever another creature you control enters, you may have this creature become a copy of that creature until end of turn."
Progenitor Mimic 88%
$1.38#5243
"You may have this creature 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.""
Phyrexian Metamorph 88%
$2.32#306
"You may have this creature enter as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types."
Undercover Operative 88%
$0.37#5367
"You may have this creature enter as a copy of any creature on the battlefield, except it enters with a shield counter on it if you control that creature."
Stunt Double 88%
$4.51#3870
"You may have this creature enter as a copy of any creature on the battlefield."
+1 more matching line
Naga Fleshcrafter 88%
$0.33#5377
"You may have this creature enter as a copy of any creature on the battlefield."
Clone 88%
$0.63#3831
"You may have this creature enter as a copy of any creature on the battlefield."
Vesuvan Doppelganger 88%
#16958
"You may have this creature enter as a copy of any creature on the battlefield, except it doesn't copy that creature's color and it has "At the beginning of your upkeep, you may have this creature become a copy of target creature, except it doesn't copy that creature's color and it has this ability.""
Auton Soldier 88%
$10.83#2016
"You may have this creature enter 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."
Activated Sleeper 87%
$1.54#8499
"You may have this creature 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."
Jwari Shapeshifter 87%
$3.79#10849
"You may have this creature enter as a copy of any Ally creature on the battlefield."
Malleable Impostor 87%
$8.10#4411
"You may have this creature 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."