(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When Invasion of Ravnica enters the battlefield, exile target nonland permanent an opponent controls that isn't exactly two colors.
Reverse Type:
Artifact Creature — Construct
Whenever you cast a spell that's exactly two colors, look at the top six cards of your library. You may reveal a card that's exactly two colors from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
NM-Mint Foil - $2.00
Lightly Played Foil - $1.80
Moderately Played Foil - $1.60
Heavily Played Foil - $1.40
Damaged Foil - $1.00
NM-Mint Foil Non English - $2.00
Lightly Played Foil Non English - $1.80
Moderately Played Foil Non English - $1.60
Heavily Played Foil Non English - $1.40
Damaged Foil Non English - $1.00