Silent Arbiter 
Artifact Creature — Construct
$9.83 #1168 1.25 22.4 years
No more than one creature can attack each combat.
No more than one creature can block each combat.
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Cards similar to Silent Arbiter 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.
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"You choose which creatures block this turn and how those creatures block."
+1 more matching line