Steelclad Serpent

Oracle Text

Steelclad Serpent can't attack unless you control another artifact.

Card Rulings

10/1/2008 The only difference between a colored artifact and a colorless artifact is, obviously, its color. Unlike most artifacts, a colored artifact requires colored mana to cast. Also unlike most artifacts, a colored artifact has a color in all zones. It will interact with cards that care about color. Other than that, a colored artifact behaves just like any other artifact. It will interact as normal with any card that cares about artifacts, such as Shatter or Arcbound Ravager.
10/1/2008 If you control two Steelclad Serpents, they’ll enable each other to attack.