Cloudkill 
Sorcery
$0.17 #16541 0.06 4.4 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.
Click a line or tag to filter
Cards similar to Cloudkill 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.
Nausea87%
$0.03↓#181630.0628.3 years↑
"All creatures get -1/-1 until end of turn."
Shrivel87%
$0.10↓#188540.0716.5 years↑
"All creatures get -1/-1 until end of turn."
Infest87%
$0.10↓#21931↓0.0724.0 years↑
"All creatures get -2/-2 until end of turn."
Languish87%
$0.35↑#5753↑0.26↑11.3 years↑
"All creatures get -4/-4 until end of turn."
Night of Souls' Betrayal84%
$2.01↑#10844↑0.60↑22.1 years↑
"All creatures get -1/-1."
Kaervek, the Spiteful83%
$0.29↑#10369↑0.58↑6.3 years↑
"Other creatures get -1/-1."
Drag to the Bottom81%
$0.12↓#21670↓0.22↑4.1 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."
Toxic Deluge80%
$5.07↑#66↑0.81↑13.0 years↑
"All creatures get -X/-X until end of turn."
Hideous Laughter78%
$0.19↑#25470↓0.31↑22.1 years↑
"All creatures get -2/-2 until end of turn."
Flowstone Slide78%
$0.17#28131↓0.20↑26.7 years↑
"All creatures get +X/-X until end of turn."
Blight Grenade78%
$0.39↑#12533↑0.32↑4.0 years
"All creatures get -3/-3 until end of turn."
Final Revels77%
$0.15↓#31487↓0.1119.0 years↑
"• All creatures get -0/-2 until end of turn."
Induce Despair76%
$0.07↓#28569↓0.1116.5 years↑
"Target creature gets -X/-X until end of turn, where X is the revealed card's mana value."
Planar Despair76%
$0.18↑#29871↓0.22↑25.4 years↑
"All creatures get -1/-1 until end of turn for each basic land type among lands you control."
Darkness Descends76%
$0.26↑#10057↑0.37↑0.7 years↓
"Put two -1/-1 counters on each creature."
Hazardous Conditions75%
$0.06↓#28996↓0.40↑10.1 years↑
"Creatures with no counters on them get -2/-2 until end of turn."
Withering Curse74%
$0.99↑#9784↑0.50↑0.5 years↓
"All creatures get -2/-2 until end of turn."
Mephitic Vapors74%
$0.11↓#21206↓0.008.0 years↑
"All creatures get -1/-1 until end of turn."
Biting Rain73%
$0.13↓#157890.24↑10.5 years↑
"All creatures get -2/-2 until end of turn."
Rollick of Abandon73%
$0.03↓#30002↓0.27↑12.5 years↑
"All creatures get +2/-2 until end of turn."