Vedalken Shackles is a mythic Artifact card from Modern Masters (MMA), collector number 218. Current market price: $8.80 (foil $28.35), TCGplayer market prices via Scryfall.
You may choose not to untap this artifact during your untap step. {2}, {T}: 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.