Karn, Silver Golem
811a0988-2900-426c-9413-8f1778d99678
$6.08 CND
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.