Clinging Mists | Magic: The Gathering
Formats Clinging Mists is Legal in
Official Oracle Text for Clinging Mists
Fateful hour — If you have 5 or less life, tap all attacking creatures. Those creatures don't untap during their controller's next untap step.
Official Rulings for Clinging Mists
1/22/2011 : Clinging Mists doesn't track the controller of the attacking creatures. If one of them changes controller before its previous controller's next untap step, it won't untap during its new controller's next untap step.