Domain of Sovereign Moon

Black and red spells cost {b}{r} less to cast
All lands are mountains and swamps in addition
to their other types. Whenever a player taps a
mountain or a swamp for mana it produces
one additional mana of that color.
All nonland permanents on the battlefield are red
and black in addition to their other colors.
The same is true for nonland permanents in the
graveyard and in each players hand.