Capture Sphere 
Enchantment — Aura
$0.05 #18702 0.25 7.9 years
Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
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Cards similar to Capture Sphere 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.
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$0.12↑#218840.258.6 years
"When this Aura enters, tap enchanted creature."
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"When this Aura enters, tap enchanted creature."
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"When this Aura enters, tap enchanted creature."
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$0.07↑#155620.256.9 years
"When this Aura enters, tap enchanted creature."
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Claustrophobia100%
$0.05#190770.36↑14.9 years↑
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Sleep Paralysis100%
$0.06↑#23005↓0.88↑10.4 years↑
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Paralyze100%
$0.13↑#205250.57↑33.1 years↑
"When this Aura enters, tap enchanted creature."
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Castaway's Despair100%
$0.09↑#26583↓0.53↑8.9 years↑
"When this Aura enters, tap enchanted creature."
+1 more matching line
Sleep with the Fishes100%
$0.18↑#195630.274.4 years↓
"Enchanted creature doesn't untap during its controller's untap step."
+2 more matching lines
Sleep Magic99%
$0.21↑#14296↑0.251.2 years↓
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Singing Bell Strike98%
$0.04↓#22935↓0.1711.9 years↑
"When this Aura enters, tap enchanted creature."
+1 more matching line
Bind the Monster98%
$0.20↑#23028↓0.335.6 years↓
"Enchanted creature doesn't untap during its controller's untap step."
+2 more matching lines
Frozen in Ice98%
$0.18↑#157350.00↓0.2 years↓
"When this Aura enters, tap enchanted creature."
+1 more matching line
Roots98%
$0.11↑#28910↓0.38↑30.9 years↑
"When this Aura enters, tap enchanted creature."
+1 more matching line
Paralyzing Grasp98%
$0.05#25144↓0.04↓16.9 years↑
"Enchanted creature doesn't untap during its controller's untap step."
+1 more matching line
Bonds of Quicksilver98%
$0.05#27356↓0.2015.9 years↑
"Enchanted creature doesn't untap during its controller's untap step."
+1 more matching line
Dehydration98%
$0.06↑#28750↓0.2526.9 years↑
"Enchanted creature doesn't untap during its controller's untap step."
+1 more matching line
Ringing Strike Mastery97%
$0.13↑#14371↑0.37↑1.4 years↓
"When this Aura enters, tap enchanted creature."
+1 more matching line
Dramatic Accusation97%
$0.08↑#185560.352.6 years↓
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Thirst97%
$0.08↑#31338↓0.62↑29.9 years↑
"When this Aura enters, tap enchanted creature."
+1 more matching line