Rune of Protection: Black {1}{W}
Enchantment
{W}: The next time a black source of your choice would deal damage to you this turn, prevent that damage.
Cycling {2} ({2}, Discard this card: Draw a card.)
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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.
Rune of Protection: White 95%
$0.20#20952
"{W}: The next time a white source of your choice would deal damage to you this turn, prevent that damage."
+1 more matching line
Story Circle 94%
$1.10#20035
"{W}: The next time a source of your choice of the chosen color would deal damage to you this turn, prevent that damage."
Rune of Protection: Blue 93%
$0.19#24759
"{W}: The next time a blue source of your choice would deal damage to you this turn, prevent that damage."
+1 more matching line
Haazda Shield Mate 92%
$0.29#29217
"{W}: The next time a source of your choice would deal damage to you this turn, prevent that damage."
Rune of Protection: Red 91%
$0.20#23579
"{W}: The next time a red source of your choice would deal damage to you this turn, prevent that damage."
+1 more matching line
Rune of Protection: Green 89%
$0.13#24089
"{W}: The next time a green source of your choice would deal damage to you this turn, prevent that damage."
+1 more matching line
Rune of Protection: Artifacts 88%
$0.26#26764
"{W}: The next time an artifact source of your choice would deal damage to you this turn, prevent that damage."
+1 more matching line