Karn, Silver Golem [From the Vault: Relics] Innistrad where X is that spell's

where X is that spell's mana value

Set: Antiquities Type: Artifact Rarity: Uncommon Cost: {2} {2}

each opponent loses 5 life

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Rarity: Rare Cost: {3}{U}{U} Horsemanship (This creature can't be blocked except by creatures with horsemanship

Set: Fate Reforged Promos Type: Instant Rarity: Rare Cost: {4}{U}{U} Return target creature to its owner's hand

Karn, Silver Golem [From the Vault: Relics] Innistrad where X is that spell'sSet: From the Vault: Relics Type: Legendary Artifact Creature Golem Rarity: Mythic 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.