Karn, the Great Creator [War of the Spark Prerelease Promos] 213 but which would you rather

but which would you rather have when it's raining

Set: Black & White: Plasma Blast Type: Grass Rarity: Ultra Rare Retreat cost: Colorless

"I have seen and heard much here

Set: Limited Edition Beta Type: Basic Land — Swamp Rarity: Common ({T}: Add {B}

Karn, the Great Creator [War of the Spark Prerelease Promos] 213 but which would you ratherSet: 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 converted mana cost. 2: You may choose an artifact card you own from outside the game or in exile, reveal that card, and put it into your hand.