(Sulfurous Jungle isn't a spell.)
When Sulfurous Jungle enters the battlefield, sacrifice it unless you pay 1 life.
Sacrifice a land: You gain 1 life.
: Add or to your mana pool.
Put Sulfurous Jungle on top of your library: Add to your mana pool.
: Add 
or 
to your mana pool.
to your mana pool. 
