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.
NM-Mint - $3.90
Lightly Played - $3.70
Moderately Played - $3.50
Heavily Played - $3.10
Damaged - $2.60
NM-Mint Non English - $3.90
Lightly Played Non English - $3.70
Moderately Played Non English - $3.50
Heavily Played Non English - $3.10
Damaged Non English - $2.60