(: Add or to your mana pool.)
When Graven Hollows enters the battlefield, sacrifice it unless you pay 1 life.
: Put a 1/1 red Shaman creature token onto the battlefield.
, : Regenerate target Snake.
: Add 
or 
to your mana pool.): Put a 1/1 red Shaman creature token onto the battlefield.
, : Regenerate target Snake.
