Deserter's Quarters is a uncommon Artifact card from Journey into Nyx (JOU), collector number 160. Current market price: $0.17 (foil $0.47), TCGplayer market prices via Scryfall.
You may choose not to untap this artifact during your untap step. {6}, {T}: Tap target creature. It doesn't untap during its controller's untap step for as long as this artifact remains tapped.