Enchantment, 1U (2) As Copy Artifact comes into play, you may choose an artifact in play. If you do, Copy Artifact comes into play as a copy of that artifact. It's still an enchantment.1
Illus. Amy Weber
10/4/2004: The copy is both an artifact and an enchantment, so it is an artifact-enchantment (perhaps even an artifact-creature-enchantment). It can be affected by anything which affects either type of permanent.
10/4/2004: The copy of the artifact is not still blue. It copies the color of the thing it is copying.
10/4/2004: The artifact to copy is chosen at the time this card enters play. If there is no valid artifact to choose, then this card enters play as a global enchantment that has no effect.