Karn, Silver Golem [Arena League 1999] Oathbreaker −10: Target player's life total

−10: Target player's life total becomes 1

among any of the creatures it's being blocked by or is blocking

If any creatures with banding you control are blocking or being blocked by a creature

Set: Scars of Mirrodin Type: Artifact — Equipment Rarity: Mythic Cost: {3} Equipped creature gets +2/+2 and has protection from green and from blue

Set: Modern Masters Type: Legendary Creature — Dragon Spirit Rarity: Mythic Cost: {4}{B}{B} Flying

Karn, Silver Golem [Arena League 1999] Oathbreaker −10: Target player's life totalSet: 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 converted mana cost until end of turn.