Juxtapose

Sorcery    (CMC:4)

You and target player exchange control of the creature you each control with the highest converted mana cost. Then exchange control of artifacts the same way. If two or more permanents a player controls are tied for highest cost, their controller chooses one of them.

41 ME1 • ENJustin Hampton

™ & © 1993—2007 Wizards of the Coast

Legal in: Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

9/16/2007
First creatures are exchanged, then artifacts are exchanged. It's possible that the same artifact creature may be involved in both exchanges.
9/16/2007
No permanents are targeted by this effect, so permanents with Shroud may be exchanged this way.
9/16/2007
If one of the players doesn't control a creature at the time the exchange would be made, that part of the effect does nothing, but the exchange of artifacts will still happen. Similarly, if one of the players doesn't control an artifact at the time the exchange would be made, that part of the effect does nothing.