Activated Sleeper {2}{B}
Creature — Phyrexian Shapeshifter
Flash
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.
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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 90%
$0.31#6056
"You may have this creature enter as a copy of any creature card in a graveyard."
Phyrexian Metamorph 89%
$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."
Auton Soldier 89%
$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."
Pirated Copy 89%
$7.51#8155
"You may have this creature enter as a copy of any creature on the battlefield, except it's a Pirate in addition to its other types and it has "Whenever this creature or another creature with the same name deals combat damage to a player, you draw a card.""
Hulking Metamorph 88%
$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."
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
Vizier of Many Faces 88%
$0.30#4322
"You may have this creature enter as a copy of any creature on the battlefield, except if this creature was embalmed, the token has no mana cost, it's white, and it's a Zombie in addition to its other types."
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."
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."
Mocking Doppelganger 87%
$4.33#5325
"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.""
+1 more matching line
Omni-Changeling 87%
$0.31#6806
"You may have this creature enter as a copy of any creature on the battlefield, except it has changeling."
Progenitor Mimic 87%
$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.""
Clever Impersonator 87%
$4.84#1275
"You may have this creature enter as a copy of any nonland permanent on the battlefield."
Waxen Shapethief 87%
$0.38#6388
"You may have this creature enter as a copy of an artifact or creature you control."
+1 more matching line
Vesuvan Doppelganger 86%
#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.""
Gigantoplasm 86%
$0.59#9543
"You may have this creature enter as a copy of any creature on the battlefield, except it has "{X}: This creature has base power and toughness X/X.""
Jwari Shapeshifter 86%
$3.79#10849
"You may have this creature enter as a copy of any Ally creature on the battlefield."