Mirrormind Crown 
Artifact — Equipment
$0.53 #4464 0.33 0.7 years
As long as this Equipment is attached to a creature, the first time you would create one or more tokens each turn, you may instead create that many tokens that are copies of equipped creature.
Equip 
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Cards similar to Mirrormind Crown 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.
Esix, Fractal Bloom91%
$0.47↓#5838↓0.305.5 years↑
"The first time you would create one or more tokens during each of your turns, you may instead choose a creature other than this card and create that many tokens that are copies of that creature."
Moonlit Meditation89%
$0.38↓#47250.21↓1.2 years
"The first time you would create one or more tokens each turn, you may instead create that many tokens that are copies of enchanted permanent."
Jinnie Fay, Jetmir's Second82%
$0.58↑#43880.15↓4.5 years↑
"If you would create one or more tokens, you may instead create that many 2/2 green Cat creature tokens with haste or that many 3/1 green Dog creature tokens with vigilance."
Draconic Visitor78%
$3.86↑#10508↓0.58↑0.0 years
"If one or more artifact tokens would be created under your control, that many 5/5 red Dragon creature tokens with flying are created instead."
Divine Visitation76%
$0.61↑#1895↑0.52↑8.0 years↑
"If one or more creature tokens would be created under your control, that many 4/4 white Angel creature tokens with flying and vigilance are created instead."