Committing to Colors

To commit to a color, anounce it publicly.
When you commit to your second color, you join a guild based on your committed colors. You cannot commit to more colors once you have a guild.
Azorius-{w}{u} Golgari-{b}{g} Rakdos-{b}{r}
Orzhov{dash}{w}{b} Gruul{dash}{r}{g} Selesnya{dash}{w}{g}
Dimir{dash}{u}{b} Boros{dash}{w}{r} Izzet{dash}{u}{r} Simic{dash}{u}{g}

Your deck cannot contain basic land cards that produce colors other than your committed colors.
When building, you may com