5/1/2006 Transguild Courier appears in a multicolored card frame, but it's still an artifact.
9/22/2011 This card is white, blue, black, red, and green in all zones. It is multicolored.
6/7/2013 Although originally printed with a characteristic-defining ability that defined its color, this card now has a color indicator. This color indicator can't be affected by text-changing effects (such as the one created by Crystal Spray), although color-changing effects can still overwrite it.