Whenever Karn, Silver Golem blocks or becomes blocked, it gets -4/+4 until end of turn. : Target noncreature artifact becomes an artifact creature with power and toughness each equal to its converted mana cost until end of turn. (That artifact retains its abilities.)
: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its converted mana cost until end of turn. (That artifact retains its abilities.) 