Oath of Teferi [Dominaria Prerelease Promos] Human Wizard Set: Wizards of the Coast:

Set: Wizards of the Coast: Black Star Promos Type: Lightning Rarity: Black Star Promo Retreat cost: Colorless

But know when they must end

Then exile this card

Set: Universes Beyond: Transformers Type: Legendary Artifact Creature — Robot Rarity: Mythic Cost: {4}{R} More Than Meets the Eye {2}{R} (You may cast this card converted for {2}{R}

Oath of Teferi [Dominaria Prerelease Promos] Human Wizard Set: Wizards of the Coast:Set: Dominaria Prerelease Promos Type: Legendary Enchantment Rarity: Rare Cost: {3}{W}{U} 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. "For the lost and forgotten, I will keep watch."