Strength of Night {2}{G}
Instant
Kicker {B} (You may pay an additional {B} as you cast this spell.)
Creatures you control get +1/+1 until end of turn. If this spell was kicked, Zombie creatures you control get an additional +2/+2 until end of turn.
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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.
Dauntless Unity 100%
$0.06#25006
"Creatures you control get +1/+1 until end of turn. If this spell was kicked, those creatures get +2/+1 until end of turn instead."
Bold Defense 100%
$0.05#30132
"Creatures you control get +1/+1 until end of turn. If this spell was kicked, instead creatures you control get +2/+2 and gain first strike until end of turn."
Pride of Conquerors 100%
$0.17#23915
"Creatures you control get +1/+1 until end of turn. If you have the city's blessing, those creatures get +2/+2 until end of turn instead."
Rhystic Shield 98%
$0.11#29583
"Creatures you control get +0/+1 until end of turn. They get an additional +0/+2 until end of turn unless any player pays {2}."
Surge of Thoughtweft 96%
$0.19#21272
"Creatures you control get +1/+1 until end of turn. If you control a Kithkin, draw a card."