Rule with an Even Hand
Conspiracy
(Start the game with this conspiracy face up in the command zone.)
You can't attack with an odd number of creatures.
Whenever you attack, double target creature's power until end of turn.
click a line to search just that ability, click more to combine them
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.
Mr. Orfeo, the Boulder 100%
$0.17#7587
"Whenever you attack, double target creature's power until end of turn."
Web of Inertia 81%
$0.75#11836
"At the beginning of combat on each opponent's turn, that player may exile a card from their graveyard. If the player doesn't, creatures they control can't attack you this turn."
Forbidding Spirit 80%
$0.16#15834
"When this creature enters, until your next turn, creatures can't attack you or planeswalkers you control unless their controller pays {2} for each of those creatures."
Akron Legionnaire 80%
#28174
"Except for creatures named this card and artifact creatures, creatures you control can't attack."