Preacher | Magic: The Gathering
Formats Preacher is Legal in
Official Oracle Text for Preacher
: For as long as Preacher remains tapped, gain control of target creature of an opponent's choice he or she controls.
Official Rulings for Preacher
9/16/2007 : Whether Preacher is tapped is checked continually, starting when the ability is activated. If, before the ability resolves, there's any point at which Preacher is untapped, the ability has no effect -- even if Preacher is tapped again by the time the ability resolves.
9/16/2007 : When you activate the ability, you choose an opponent, then that opponent chooses the target.