Cone of Cold 

Sorcery
$0.29 #6748 0.41 4.2 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%
$0.22↓#60960.65↑17.1 years↑
"Tap all creatures target player controls. Those creatures don't untap during that player's next untap step."
Scion of Stygia92%
$0.08↓#16072↓0.335.1 years
"Tap that creature. It doesn't untap during its controller's next untap step."
+2 more matching lines
Take into Custody80%
$0.05↓#23529↓0.27↓9.6 years↑
"Tap target creature. It doesn't untap during its controller's next untap step."
Githzerai Monk79%
$0.27↓#9838↓0.334.2 years
"When this creature enters, tap all creatures you don't control."
Press for Answers78%
$0.05↓#20217↓0.11↓10.4 years↑
"Tap target creature. It doesn't untap during its controller's next untap step."
Imposing Sovereign78%
$0.39↑#12263↓0.79↑13.1 years↑
"Creatures your opponents control enter tapped."
Decision Paralysis78%
$0.05↓#27142↓0.53↑9.4 years↑
"Tap up to two target creatures. Those creatures don't untap during their controller's next untap step."
Frost Breath78%
$0.11↓#17737↓0.53↑15.1 years↑
"Tap up to two target creatures. Those creatures don't untap during their controller's next untap step."
Urabrask the Hidden78%
$4.08↑#1767↑0.70↑15.3 years↑
"Creatures your opponents control enter tapped."
Tranquilize78%
$0.17↓#13061↓0.57↑2.2 years↓
"Tap target creature an opponent controls and put three stun counters on it."