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↓#18163↑0.0628.3 years↑
"All creatures get -1/-1 until end of turn."
removal-toughness, symmetrical, sweeper
Shrivel94%
$0.10↓#18854↑0.0716.5 years↓
"All creatures get -1/-1 until end of turn."
removal-toughness, symmetrical, sweeper
Infest94%
$0.10↓#21931↑0.0724.0 years↑
"All creatures get -2/-2 until end of turn."
removal-toughness, symmetrical, sweeper
Languish94%
$0.35↑#5753↑0.26↑11.3 years↓
"All creatures get -4/-4 until end of turn."
removal-toughness, symmetrical, sweeper
Night of Souls' Betrayal91%
$2.01↑#10844↑0.60↑22.1 years↑
"All creatures get -1/-1."
removal-toughness, symmetrical, sweeper
Kaervek, the Spiteful90%
$0.29↑#10369↑0.58↑6.3 years↓
"Other creatures get -1/-1."
removal-toughness, symmetrical, sweeper
Orzhov Pontiff90%
$0.16↑#252880.1120.7 years↑
"• Creatures you don't control get -1/-1 until end of turn."