Oath of Teferi [Dominaria Prerelease Promos] 73a Ziatora's Proving Ground enters the

Ziatora's Proving Ground enters the battlefield tapped

Set: EX: Legend Maker Type: Darkness Rarity: Rare Retreat cost: Colorless

where X is 2 plus the sacrificed creature's mana value

Set: Unknown Event Type: Artifact Creature — Dragon Rarity: Common Cost: {7} Flying

Set: Gym Challenge 1st Edition Type: Colorless Rarity: Holo Rare

Oath of Teferi [Dominaria Prerelease Promos] 73a Ziatora's Proving Ground enters theSet: 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."