Cone of Cold 

Sorcery
$0.29 #6925 0.45 4.4 years
Roll a d20.
1—9 | Tap all creatures your opponents control.
10—19 | Tap all creatures your opponents control. Those creatures don't untap during their controllers' next untap steps.
20 | Tap all creatures your opponents control. Those creatures don't untap during their controllers' next untap steps. Until your next turn, creatures your opponents control enter tapped.
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Cards similar to Cone of Cold 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.
Sleep92%
$0.24↓#61870.94↑17.3 years↑
"Tap all creatures target player controls. Those creatures don't untap during that player's next untap step."
Scion of Stygia92%
$0.10↓#16408↓0.25↓5.2 years
"Tap that creature. It doesn't untap during its controller's next untap step."
+2 more matching lines
Take into Custody80%
$0.04↓#23846↓0.06↓9.7 years↑
"Tap target creature. It doesn't untap during its controller's next untap step."
Githzerai Monk79%
$0.24↓#10044↓0.25↓4.4 years
"When this creature enters, tap all creatures you don't control."
Imposing Sovereign78%
$0.40↑#12509↓0.92↑13.3 years↑
"Creatures your opponents control enter tapped."
Press for Answers78%
$0.06↓#20546↓0.12↓10.5 years↑
"Tap target creature. It doesn't untap during its controller's next untap step."
Frost Breath78%
$0.07↓#18110↓0.29↓15.3 years↑
"Tap up to two target creatures. Those creatures don't untap during their controller's next untap step."
Decision Paralysis78%
$0.05↓#27397↓0.20↓9.5 years↑
"Tap up to two target creatures. Those creatures don't untap during their controller's next untap step."
Tranquilize78%
$0.14↓#13245↓0.26↓2.3 years↓
"Tap target creature an opponent controls and put three stun counters on it."