Invasion Plans {2}{R}
Enchantment
All creatures block each combat if able.
The attacking player chooses how each creature blocks each combat.
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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.
Mirri, Weatherlight Duelist 82%
$5.76#2655
"Whenever this card attacks, each opponent can't block with more than one creature this combat."