Spirit Cairn {2}{W}
Enchantment
Whenever a player discards a card, you may pay {W}. If you do, create a 1/1 white Spirit creature token with flying.
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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.
Ethereal Investigator 81%
$0.40#3972
"Whenever you draw your second card each turn, create a 1/1 white Spirit creature token with flying."
Thalia's Geistcaller 81%
$0.24#21246
"Whenever you cast a spell from your graveyard, create a 1/1 white Spirit creature token with flying."
Clarion Spirit 81%
$0.17#7013
"Whenever you cast your second spell each turn, create a 1/1 white Spirit creature token with flying."