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.
Nausea94%
$0.03↓#17556↑0.0028.2 years↑
"All creatures get -1/-1 until end of turn."
removal-toughness, symmetrical, sweeper
Shrivel94%
$0.10↓#18243↑0.24↑16.4 years↓
"All creatures get -1/-1 until end of turn."
removal-toughness, symmetrical, sweeper
Infest94%
$0.13↓#21635↑0.0523.9 years↑
"All creatures get -2/-2 until end of turn."
removal-toughness, symmetrical, sweeper
Languish94%
$0.34↑#5680↑0.19↑11.1 years↓
"All creatures get -4/-4 until end of turn."
removal-toughness, symmetrical, sweeper
Night of Souls' Betrayal91%
$2.02↑#10440↑0.91↑21.9 years↑
"All creatures get -1/-1."
removal-toughness, symmetrical, sweeper
Toxic Deluge90%
$4.49↑#67↑0.87↑12.8 years↓
"All creatures get -X/-X until end of turn."
removal-toughness, symmetrical, sweeper
Kaervek, the Spiteful90%
$0.28↑#9999↑0.38↑6.2 years↓
"Other creatures get -1/-1."
removal-toughness, symmetrical, sweeper
Orzhov Pontiff90%
$0.13↓#250620.56↑20.6 years↑
"• Creatures you don't control get -1/-1 until end of turn."