Quiet Contemplation

• WWizards of the Coast2014-09-20
  Official Ruling
  The ability tracks the creature, but not its controller. If the creature changes controllers before its first controller’s next untap step has come around, then it won’t untap during its new controller’s next untap step.
• WWizards of the Coast2014-09-20
  Official Ruling
  The ability can target a creature that’s already tapped. It still won’t untap during its controller’s next untap step.
• WWizards of the Coast2014-09-20
  Official Ruling
  You decide whether to pay as the triggered ability resolves.

Rulings via Scryfall