Karn, the Great Creator [War of the Spark Prerelease Promos] PW you may search your library

you may search your library for a land card

[1LL] Lightning Strike (40)

Target creature gains first strike until end of turn

Set: Darksteel Type: Artifact — Equipment Rarity: Rare Cost: {3} Equipped creature gets +2/+2 and has protection from white and from black

After this phase

Karn, the Great Creator [War of the Spark Prerelease Promos] PW you may search your librarySet: 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.