Steelclad Serpent 

Artifact Creature — Serpent
$0.07 #30615 0.00 17.9 years
This creature can't attack unless you control another artifact.
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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.
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"This creature can't attack unless you've cast a creature spell this turn."
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"This creature can't attack unless you pay
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