Petrifying Meddler {4}{U}
Creature — Eldrazi
Devoid (This card has no color.)
When you cast this spell, tap up to one target creature and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
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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.
Vault 112: Sadistic Simulation 88%
$0.28#10967
"Tap up to one target creature and put a stun counter on it. You get {E}{E} ."
Origin of Captain America 87%
$0.71#27868
"Tap up to one target creature and put a stun counter on it."