Trading Time

Exchange as many cards from your hand to your opponents and vice versa.
The number of cards traded is equal to {x}.
You may trade less cards than the total of {x}.
You can also trade creatures and planeswalkers, enchantments, sagas, artifacts,
lands, etc, that are on the battlefield.
The cards that are traded from the battlefield
have their control swapped from
someone to someone else. Effects still apply.
If a trade is not agreed on, both players lose.