When Graven Flats enters the battlefield, sacrifice it unless you pay .
, : Add , or to your mana pool.
: Graven Flats becomes a 2/2 red Shaman creature until end of turn. It's still a land.
.
, 
: Add 
, or to your mana pool.
: Graven Flats becomes a 2/2 red Shaman creature until end of turn. It's still a land.
