Karn, the Great Creator [War of the Spark Prerelease Promos] Duel the controller of the permanent

the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step

there is an additional combat phase

The son of Gerrard's surrogate father

You gain control of that creature if it regenerates this way

Karn, the Great Creator [War of the Spark Prerelease Promos] Duel the controller of the permanentSet: War of the Spark Prerelease Promos Type: Legendary Planeswalker Karn Rarity: Rare Cost: {4} Activated abilities of artifacts your opponents control can't be activated. +1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value. 2: You may reveal an artifact card you own from outside the game or choose a face up artifact card you own in exile. Put that card