Karn's Temporal Sundering [Dominaria Prerelease Promos]

Set: Dominaria Prerelease Promos Type: Legendary Sorcery Rarity: Rare Cost: {4}{U}{U} (You may cast a legendary sorcery only if you control a legendary creature or planeswalker.)Target player takes an extra turn after this one. Return up to one target nonland permanent to its owner's hand. Exile Karn's Temporal Sundering. Centuries ago, a quest to harness time became a spiral into chaos.