Sivvi's Valor {2}{W}
Instant
If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost.
All damage that would be dealt to target creature this turn is dealt to you instead.
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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.
Angelic Favor 100%
$0.24#24107
"If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost."
Ramosian Rally 100%
$0.30#26549
"If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost."
Orim's Cure 100%
$0.14#29485
"If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost."
Lashknife 100%
$0.16#18964
"If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost."