Vedalken Shackles 
Artifact
You may choose not to untap Vedalken Shackles 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 Vedalken Shackles remains tapped. - [MMA] Modern Masters #218 (M)
- [5DN] Fifth Dawn #164 (R)
- [MPS_KLD] Masterpiece Series: Kaladesh Inventions #53 (M)