Vedalken Shackles 
Artifact
$6.86 #11860 0.61 22.4 years
You may choose not to untap this artifact during your untap step.
, 
: Gain control of target creature with power less than or equal to the number of Islands you control for as long as this artifact remains tapped.Click a line or tag to filter
Cards similar to Vedalken Shackles 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.
Helm of Possession82%
$4.86↓#15096↓0.43↓29.0 years↑
"You may choose not to untap this artifact during your untap step."
+1 more matching line
Kraken of the Straits78%
$0.35↓#141600.21↓12.7 years↓
"Creatures with power less than the number of Islands you control can't block this creature."
Old Man of the Sea77%
$240.67↑#26094↓0.38↓32.8 years↑
": Gain control of target creature with power less than or equal to this creature's power for as long as this creature remains tapped and that creature's power remains less than or equal to this creature's power."
: Gain control of target creature with power less than or equal to this creature's power for as long as this creature remains tapped and that creature's power remains less than or equal to this creature's power."+1 more matching line
Rubinia Soulsinger76%
$0.37↓#19426↓0.6332.4 years↑
": Gain control of target creature for as long as you control this card and this card remains tapped."
: Gain control of target creature for as long as you control this card and this card remains tapped."+1 more matching line
Beguiler of Wills72%
$2.35↓#121050.77↑14.7 years↓
": Gain control of target creature with power less than or equal to the number of creatures you control."
: Gain control of target creature with power less than or equal to the number of creatures you control."