Whenever Karn 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.
Karn, Silver Golem has 4 listed printings; the most valuable is the Arena League printing from PAL99 at US$90.59 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
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