Callous Oppressor {1}{U}{U}
Creature — Octopus
You may choose not to untap this creature during your untap step.
As this creature enters, an opponent chooses a creature type.
{T}: Gain control of target creature that isn't of the chosen type for as long as this creature remains tapped.
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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.
Rubinia Soulsinger 83%
$0.37#18629
"{T}: Gain control of target creature for as long as you control this card and this card remains tapped."
+1 more matching line
Preacher 83%
#22058
"{T}: For as long as this creature remains tapped, gain control of target creature of an opponent's choice they control."
+1 more matching line
Willow Satyr 83%
#23942
"{T}: Gain control of target legendary creature for as long as you control this creature and this creature remains tapped."
+1 more matching line
Phyrexian Gremlins 100%
$1.03#29985
"You may choose not to untap this creature during your untap step."
Everglove Courier 100%
$0.09#29550
"You may choose not to untap this creature during your untap step."
Frightshroud Courier 100%
$0.15#29794
"You may choose not to untap this creature during your untap step."
Flamestick Courier 100%
$0.07#29066
"You may choose not to untap this creature during your untap step."
Ghosthelm Courier 100%
$0.20#28584
"You may choose not to untap this creature during your untap step."
Hedge Whisperer 100%
$0.07#25634
"You may choose not to untap this creature during your untap step."
Thalakos Dreamsower 100%
$0.24#26910
"You may choose not to untap this creature during your untap step."
Whip Vine 100%
$0.12#27095
"You may choose not to untap this creature during your untap step."
+1 more matching line
Pearlspear Courier 100%
$0.09#31145
"You may choose not to untap this creature during your untap step."