Grand Melee 

Enchantment
All creatures attack each combat if able.
All creatures block each combat if able.
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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.
Public Enemy 85%
$0.27#10810
"All creatures attack enchanted creature's controller each combat if able."
Avatar of Slaughter 85%
$0.37#7506
"All creatures have double strike and attack each combat if able."