Hidden Strings 
Sorcery
$0.33 #4120 0.33 13.5 years
You may tap or untap target permanent, then you may tap or untap another target permanent.
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 Hidden Strings 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.
Toils of Night and Day96%
$0.17↓#18392↓0.00↓21.7 years↑
"You may tap or untap target permanent, then you may tap or untap another target permanent."
Psychic Puppetry90%
$0.34↑#18561↓0.00↓22.1 years↑
"You may tap or untap target permanent."
Shadow Slice88%
$0.04↓#22713↓0.2713.7 years
"Cipher"
Call of the Nightwing88%
$0.18↓#17416↓0.00↓13.7 years
"Cipher"
Hands of Binding88%
$0.16↓#15734↓0.2913.7 years
"Cipher"
+1 more matching line
Writ of Return87%
$0.38↑#11636↓0.11↓4.5 years↓
"Cipher"
Pestermite86%
$0.25↓#11024↓0.12↓19.0 years↑
"When this creature enters, you may tap or untap target permanent."
Tidal Force86%
$0.48↑#17017↓0.18↓13.0 years
"At the beginning of each upkeep, you may tap or untap target permanent."
Paranoid Delusions86%
$0.16↓#16613↓0.06↓13.7 years
"Cipher"
Ral Zarek85%
$0.56↑#5904↓0.71↑13.5 years
"+1: Tap target permanent, then untap another target permanent."
Dream's Grip85%
$0.39↑#9275↓0.22↓23.0 years↑
"• Untap target permanent."
Reality Spasm84%
$0.48↑#11236↓0.52↑16.5 years↑
"• Untap X target permanents."
Midnight Recovery84%
$0.15↓#19280↓0.06↓13.7 years
"Cipher"
Last Thoughts84%
$0.17↓#17400↓0.05↓13.7 years
"Cipher"
Mental Vapors83%
$0.09↓#23199↓0.2613.7 years
"Cipher"
Voidwalk82%
$0.25↓#13976↓0.2913.7 years
"Cipher"
Trait Doctoring82%
$0.32↓#13480↓0.3213.5 years
"Cipher"
Stolen Identity82%
$0.32↓#48370.17↓13.7 years
"Cipher"
Captain of the Mists82%
$0.20↓#20018↓0.3314.5 years
", 
: You may tap or untap target permanent."
, : You may tap or untap target permanent."
Burst of Energy81%
$0.18↓#18695↓0.06↓27.7 years↑
"Untap target permanent."