Instant, UU (2) Return target creature to its owner's hand. Then return another target creature to its owner's hand unless its controller pays {1}.1 "We outnumber them! Charge! Charge! Hey, where'd you guys go? Retreat! Retreat!"
Illus. Adam Rex
The creature's controller gets the option to pay when the spell resolves. [Prophecy FAQ 2000/05/25]
The two creatures may have different controllers. [DeLaney 2000/05/29]
Must target two different creatures. [DeLaney 2000/06/20]
You choose on announcement which creature is the one that can be paid to prevent the effect. The payment itself is made on resolution (if at all). [DeLaney 2000/06/20]