Deceiver Exarch 

Creature — Phyrexian Cleric
$0.16 #13928 0.18 15.4 years
Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, choose one —
• Untap target permanent you control.
• Tap target permanent an opponent controls.
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Cards similar to Deceiver Exarch 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.
Kelpie Guide90%
$0.24↑#4723↑0.06↓5.5 years↓
"
: Untap another target permanent you control."
+1 more matching line
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"When this card enters, choose one or both —"
+1 more matching line
Pestermite87%
$0.25↑#11024↑0.1219.0 years↑
"When this creature enters, you may tap or untap target permanent."
+1 more matching line
Tidal Force85%
$0.48↑#17017↓0.1813.0 years↓
"At the beginning of each upkeep, you may tap or untap target permanent."
Toils of Night and Day85%
$0.17↑#18392↓0.00↓21.7 years↑
"You may tap or untap target permanent, then you may tap or untap another target permanent."
Ral Zarek84%
$0.56↑#5904↑0.71↑13.5 years↓
"+1: Tap target permanent, then untap another target permanent."
Rimewind Taskmage83%
$0.18↑#18656↓0.2020.2 years↑
"
,
: You may tap or untap target permanent. Activate only if you control four or more snow permanents."
Coral Trickster82%
$0.07↓#22865↓0.1820.0 years↑
"When this creature is turned face up, you may tap or untap target permanent."