Graven Barrens enters the battlefield tapped.
: Add or to your mana pool.
Put Graven Barrens on top of your library: Add to your mana pool.
, Sacrifice Graven Barrens: Graven Barrens deals 1 damage to target creature or player.
: Add 
or 
to your mana pool.
to your mana pool. , Sacrifice Graven Barrens: Graven Barrens deals 1 damage to target creature or player.
