Capture Sphere 

Enchantment — Aura
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 that do something similar 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.
Ringing Strike Mastery 100%
$0.15#14343
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Bitter Chill 100%
$0.25#12816
"When this Aura enters, tap enchanted creature."
+1 more matching line
Sleeping Potion 100%
$0.14#29365
"When this Aura enters, tap enchanted creature."
+1 more matching line
Singing Bell Strike 100%
$0.04#22497
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Containment Protocol 100%
$0.28#29119
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Stay Hidden, Stay Silent 100%
$0.18#17199
"When this Aura enters, tap enchanted creature."
+1 more matching line
Runner's Bane 100%
$0.05#28830
"When this Aura enters, tap enchanted creature."
+1 more matching line
Encase in Ice 100%
$0.07#27561
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Sleep Paralysis 100%
$0.17#22658
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Castaway's Despair 100%
$0.09#26285
"When this Aura enters, tap enchanted creature."
+1 more matching line
Starlight Snare 100%
$0.12#20167
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Claustrophobia 100%
$0.05#18730
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Charmed Sleep 100%
$0.10#15232
"When this Aura enters, tap enchanted creature."
+2 more matching lines
Dramatic Accusation 100%
$0.08#18185
"When this Aura enters, tap enchanted creature."
+1 more matching line
Mystic Restraints 100%
$0.08#29322
"When this Aura enters, tap enchanted creature."
+2 more matching lines