Ritual of the Profane Moon

Sacrifice a creature: If a red creature were sacrificed
this way add {r} and all lands become mountains
until end of turn, if a black creature were sacrificed
this way add {b} and all lands become swamps
until end of turn, if a creature that is both red and
black were sacrificed this way add {b}{r} and all lands
become swamps and mountains until end of turn.

The world was drowned in a sea of blood,
yet the moon ever hungered