Karn, the Great Creator [War of the Spark Prerelease Promos] Mountain Plains Cao Cao was able to

Cao Cao was able to defeat Yuan Shao and his 700

or enchanted by anything blue

Whenever you cast an instant or sorcery spell or activate an ability

the Ravager enters the battlefield

Karn, the Great Creator [War of the Spark Prerelease Promos] Mountain Plains Cao Cao was able toSet: 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