Karn, the Great Creator (Japanese Alternate Art) [War of the Spark Promos] WTR206-C {T}: Add {R} or {W}

{T}: Add {R} or {W}

An Xyz Monster whose original Type is Beast-Warrior and has this card as material gains this effect

Set: Alpha Edition Type: Creature — Rat Rarity: Common Cost: {2}{B} Plague Rats's power and toughness are each equal to the number of creatures named Plague Rats on the battlefield

instead it's turned face up and assigns or deals damage

Set: Pro Tour Collector Set Type: Land Rarity: Rare Whenever City of Brass becomes tapped

Karn, the Great Creator (Japanese Alternate Art) [War of the Spark Promos] WTR206-C {T}: Add {R} or {W}Set: War of the Spark 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 into your hand.