Artifact Creature - Golem 3/3, 4 (4) Transguild Courier is all colors (even if this card isn't in play).1 Reluctant to meet face to face, the leaders of the ten guilds prefer to do official business through a go-between immune to bribes and threats.
Illus. John Avon
Being all colors means it is black, blue, green, red, and white. [Dissension FAQ 2006/04/13] This is true even though it has a colorless mana cost and is an artifact.