: Exchange control of two target nonlegendary creatures. You can't activate this ability during combat.
10/17/2013 You don’t have to control either target.
10/17/2013 If the same player controls both creatures when the ability resolves, nothing happens.
10/17/2013 If one of the creatures is an illegal target when the ability resolves, the exchange won’t happen. If both creatures are illegal targets, the ability won’t resolve.