MAGIC: THE GATHERING
When Oath of Teferi enters the battlefield, exile another target permanent you control. Return it to the battlefield under its owner's control at the beginning of the next end step.
You may activate the loyalty abilities of planeswalkers you control twice each turn rather than only once.
Superfriends decks (ie: lots of planeswalkers) are very popular, and Oath of Teferi can allow them to reach new heights of power. Throw in a Chain Veil and watch your opponents' eyes spin.