Karn, Silver Golem
18fb9c27-0027-4b77-87bf-af0d0bd2278b
$8.45 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.