When Volcano Shelter enters the battlefield, sacrifice it unless you pay 1 life.
: Add or to your mana pool.
Put Volcano Shelter on top of your library: Add to your mana pool.
, : Target player reveals the top card of his or her library.
: Add 
or 
to your mana pool.
to your mana pool. , : Target player reveals the top card of his or her library.
