Karn, Silver Golem [From the Vault: Relics] Nahiri Set: Betrayers of Kamigawa Type:

Set: Betrayers of Kamigawa Type: Instant — Arcane Rarity: Rare Cost: {X}{U}{U} You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost

If it has neither

" —Azguri

Set: Foundations Type: Legendary Creature — Elf Noble Rarity: Rare Cost: {2}{B}{G} Menace

Set: Mystery Booster Playtest Cards Type: Enchantment — Aura Rarity: Rare Cost: {2}{G} Enchant two creatures

Karn, Silver Golem [From the Vault: Relics] Nahiri Set: Betrayers of Kamigawa Type:Set: 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.