Graven Flats enters the battlefield tapped.
, Pay 1 life: Add or to your mana pool.
, , Sacrifice Graven Flats: Draw a card.
: Graven Flats becomes a 1/1 black and red Elemental creature with first strike until end of turn. It's still a land.
, Pay 1 life: Add 
or 
to your mana pool.
, , Sacrifice Graven Flats: Draw a card.: Graven Flats becomes a 1/1 black and red Elemental creature with first strike until end of turn. It's still a land.
