Graven Oasis enters the battlefield tapped.
, : Add , or to your mana pool. Graven Oasis deals 1 damage to you.
: Return Graven Oasis to its owner's hand.
, 
: Add 
, 
or to your mana pool. Graven Oasis deals 1 damage to you.: Return Graven Oasis to its owner's hand.
