Juxtapose

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

Masters Edition

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.

Classic Sixth Edition

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, that player chooses between them.)

Fifth Edition

Exchange with target player control of the creature with the highest total casting cost that you each control. If two or more creatures are tied for highest total casting cost creature a player controls, he or she chooses between them. Exchange control of artifacts in the same way.

Chronicles Foreign Black Border

Chronicles

You and target player each choose one of the creatures you control with the highest casting cost. Exchange control of these creatures. Then do the same for artifacts. If one of the players does not control a creature or artifact, don't exchange that type of card.

First creatures are exchanged, then artifacts are exchanged. It's possible that the same artifact creature may be involved in both exchanges.

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.

No permanents are targeted by this effect, so permanents with Shroud may be exchanged this way.