Karn, Silver Golem

Card Name

Karn, Silver Golem

Mana Cost

5

Type

Legendary Artifact Creature – Golem

Rarity

Rare

rules Text

Whenever Karn, Silver Golem blocks or becomes blocked, it gets -4/+4 until end of turn.
1
: Target noncreature artifact is an artifact creature with power and toughness each equal to its casting cost until end of turn. (That artifact retains its abilities.)

Legal Formats

Commander, Legacy, Vintage

Not Legal Formats

Alchemy, Brawl, Explorer, Historic, Modern, Pauper, Pioneer, Standard

Rulings

(10/4/2004)
The blocking ability triggers only once no matter how many blockers are declared.
(8/1/2008)
A noncreature permanent that turns into a creature can attack, and its abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.