(Peat Basilica isn't a spell.)
Peat Basilica enters the battlefield tapped unless you control four or more artifact creatures.
All creatures have Mountainwalk.
: Add to your mana pool.
: Add or to your mana pool. Each opponent gains 1 life.
: Add 
to your mana pool.: Add 
or 
to your mana pool. Each opponent gains 1 life.
