Mirrorform 
Instant
$1.39 #6739 0.00 0.6 years
Each nonland permanent you control becomes a copy of target non-Aura permanent.
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Cards similar to Mirrorform 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.
Impossible Man76%
$3.72↑#21937↓0.000.2 years
"
: this card becomes a copy of another target permanent until end of turn, except his name is this card."
: this card becomes a copy of another target permanent until end of turn, except his name is this card."
Doppelgang72%
$1.70↑#2943↑0.43↑2.6 years↑
"For each of X target permanents, create X tokens that are copies of that permanent."
Crystalline Resonance72%
$0.28↓#16031↓0.15↑6.4 years↑
"Whenever you cycle a card, you may have this enchantment become a copy of another target permanent until your next turn, except it has this ability."
Masterful Replication72%
$0.30↓#8813↓0.21↑7.2 years↑
"• Choose target artifact you control. Each other artifact you control becomes a copy of that artifact until end of turn."
Replication Technique70%
$0.18↓#4320↑0.27↑5.4 years↑
"Create a token that's a copy of target permanent you control."
Sakashima's Will70%
$0.33↓#8734↓0.18↑5.8 years↑
"• Choose a creature you control. Each other creature you control becomes a copy of that creature until end of turn."
Applied Geometry70%
$0.28↓#13096↓0.000.4 years
"Create a token that's a copy of target non-Aura permanent you control, except it's a 0/0 Fractal creature in addition to its other types. Put six +1/+1 counters on it."