Mirrorform 
Instant
$1.69 #6289 0.51 0.7 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%
$2.49↑#20695↓0.41↓0.3 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%
$1.49↓#2992↑0.35↓2.7 years↑
"For each of X target permanents, create X tokens that are copies of that permanent."
Crystalline Resonance72%
$0.28↓#16324↓0.06↓6.5 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 Replication71%
$0.29↓#8965↓0.36↓7.3 years↑
"• Choose target artifact you control. Each other artifact you control becomes a copy of that artifact until end of turn."
Replication Technique71%
$0.22↓#4275↑0.23↓5.5 years↑
"Create a token that's a copy of target permanent you control."
Applied Geometry70%
$0.27↓#12502↓0.09↓0.5 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."
Sakashima's Will70%
$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."