Karn, Silver Golem [Arena League 1999] SM172 Set: Diamond & Pearl: Base

Set: Diamond & Pearl: Base Set Type: Lightning Rarity: Uncommon Retreat cost: 0

Set: EX: Emerald Type: Fighting Rarity: Ultra Rare Retreat cost: Colorless

Set: Diamond & Pearl: Mysterious Treasures Type: Item Rarity: Secret Rare

Set: Sun & Moon: Celestial Storm Type: Water Rarity: Ultra Rare Retreat cost: Colorless

and "Once per Turn Action - {r}{r}{r}: Attack"

Karn, Silver Golem [Arena League 1999] SM172 Set: Diamond & Pearl: BaseSet: Arena League 1999 Type: Legendary Artifact Creature Golem Rarity: Rare Cost: {5} Whenever Karn, Silver Golem blocks or becomes blocked, it gets 4 +4 until end of turn. {1}: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn.