Portals Of Bias

If {b}, {u} and {w} was paid when casting Portals Of
Bias, green and red spells cost {2} more.
If {g}, {r} and {w} was paid when casting Portals Of
Bias, blue and black spells cost {2} more.
If {b}, {r} and {w} was paid when casting Portals Of
Bias, green and blue spells cost {2} more.
If {g}, {u} and {w} was paid when casting Portals Of
Bias, black and red spells cost {2} more.
White and colorless spells you cast cost {2} less.