Metalcraft — Etched Champion has protection from all colors as long as you control three or more artifacts.
Its predecessors were etched with the wisdom of ancients; its own etchings bear warnings of a future fraught with war.
Official Rulings for Etched Champion
1/1/2011 : "Protection from all colors" means protection from white, from blue, from black, from red, and from green. (In other words, it doesn't just mean "protection from objects that have all five colors.")