Shrivel 
Sorcery
$0.10 #18243 0.24 16.4 years
All creatures get -1/-1 until end of turn.
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Cards similar to Shrivel 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.
Nausea100%
$0.03↓#175560.00↓28.2 years↑
"All creatures get -1/-1 until end of turn."
Infest100%
$0.13↑#216350.05↓23.9 years↑
"All creatures get -2/-2 until end of turn."
Languish100%
$0.34↑#5680↑0.1911.1 years↓
"All creatures get -4/-4 until end of turn."
Toxic Deluge98%
$4.49↑#67↑0.87↑12.8 years↓
"All creatures get -X/-X until end of turn."
Night of Souls' Betrayal98%
$2.02↑#10440↑0.91↑21.9 years↑
"All creatures get -1/-1."
Kaervek, the Spiteful97%
$0.28↑#9999↑0.38↑6.2 years↓
"Other creatures get -1/-1."
Hideous Laughter95%
$0.20↑#25202↓0.3021.9 years↑
"All creatures get -2/-2 until end of turn."
Blight Grenade95%
$0.38↑#12213↑0.05↓3.9 years↓
"All creatures get -3/-3 until end of turn."
Final Revels94%
$0.16↑#31154↓0.06↓18.9 years↑
"• All creatures get -0/-2 until end of turn."
Flowstone Slide94%
$0.15↑#27736↓0.2926.6 years↑
"All creatures get +X/-X until end of turn."
Drag to the Bottom93%
$0.06↓#212760.07↓4.0 years↓
"Each creature gets -X/-X until end of turn, where X is 1 plus the number of basic land types among lands you control."
Planar Despair92%
$0.16↑#29423↓0.12↓25.3 years↑
"All creatures get -1/-1 until end of turn for each basic land type among lands you control."
Withering Curse91%
$1.38↑#10534↑0.00↓0.4 years↓
"All creatures get -2/-2 until end of turn."
Hazardous Conditions90%
$0.05↓#28718↓0.38↑9.9 years↓
"Creatures with no counters on them get -2/-2 until end of turn."
Mephitic Vapors90%
$0.11↑#205910.36↑7.9 years↓
"All creatures get -1/-1 until end of turn."
Biting Rain88%
$0.12↑#155230.38↑10.4 years↓
"All creatures get -2/-2 until end of turn."
Rollick of Abandon87%
$0.04↓#29699↓0.2912.3 years↓
"All creatures get +2/-2 until end of turn."
Nuclear Fallout87%
$3.44↑#3026↑0.42↑2.5 years↓
"Each creature gets twice -X/-X until end of turn. Each player gets X rad counters."
Cloudkill87%
$0.21↑#161350.304.2 years↓
"All creatures get -X/-X until end of turn, where X is the greatest mana value of a commander you own on the battlefield or in the command zone."
Drown in Sorrow87%
$0.20↑#195870.50↑12.6 years↓
"All creatures get -2/-2 until end of turn. Scry 1."