Hands of Binding 
Sorcery
$0.19 #15580 0.33 13.6 years
Tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
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Cards similar to Hands of Binding 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.
Shadow Slice96%
$0.04↓#22576↓0.48↑13.6 years
"Cipher"
Call of the Nightwing96%
$0.13↓#171690.18↓13.6 years
"Cipher"
Writ of Return96%
$0.39↑#11408↑0.11↓4.4 years↓
"Cipher"
Paranoid Delusions96%
$0.14↓#164220.59↑13.6 years
"Cipher"
Midnight Recovery92%
$0.13↓#19071↓0.3113.6 years
"Cipher"
Ojutai's Breath92%
$0.06↓#22059↓0.00↓11.4 years↓
"Tap target creature. It doesn't untap during its controller's next untap step."
Take into Custody90%
$0.05↓#23529↓0.279.6 years↓
"Tap target creature. It doesn't untap during its controller's next untap step."
Last Thoughts90%
$0.18↓#171910.06↓13.6 years
"Cipher"
Mental Vapors90%
$0.06↓#22893↓0.80↑13.6 years
"Cipher"
Trait Doctoring90%
$0.34↑#134400.3613.3 years
"Cipher"
Voidwalk90%
$0.22↑#137530.20↓13.6 years
"Cipher"
Press for Answers89%
$0.05↓#20217↓0.11↓10.4 years↓
"Tap target creature. It doesn't untap during its controller's next untap step."
Stolen Identity89%
$0.33↑#4749↑0.11↓13.6 years
"Cipher"
Hidden Strings88%
$0.29↑#4193↑0.3313.3 years
"Cipher"
Crippling Chill87%
$0.03↓#19745↓0.12↓14.3 years
"Tap target creature. It doesn't untap during its controller's next untap step."
Whispering Madness87%
$2.57↑#3160↑0.57↑13.6 years
"Cipher"
Arcane Heist87%
$2.94↑#5097↑0.362.4 years↓
"Cipher"
Rooftop Nuisance86%
$0.12↓#22869↓0.00↓4.4 years↓
"Tap target creature. It doesn't untap during its controller's next untap step."
Tranquilize86%
$0.17↓#130610.57↑2.2 years↓
"Tap target creature an opponent controls and put three stun counters on it."
Watertrap Weaver86%
$0.06↓#22206↓0.53↑8.9 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step."