Karn, the Great Creator [War of the Spark] Gateway 2008 (Whenever you cast a spell

(Whenever you cast a spell

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Set: Ultimate Masters Type: Legendary Land Mythic Cost: {T}: Add {W}

it gains trample and indestructible until end of turn

you may pay {0} rather than pay this spell's mana cost

Karn, the Great Creator [War of the Spark] Gateway 2008 (Whenever you cast a spellSet: War of the Spark Type: Legendary Planeswalker Karn 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.