Karn, Silver Golem [Arena League 1999] Vanguard you may change "swampwalk" to

you may change "swampwalk" to "plainswalk

Set: Khans of Tarkir Prerelease Promos Type: Instant Rarity: Rare Cost: {R}{W} The next time a source of your choice would deal damage to you this turn

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

the dwarven forces had reduced the mighty walls to mere rubble

it used to be seven men

Karn, Silver Golem [Arena League 1999] Vanguard you may change "swampwalk" toSet: 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.