(Fire-Lit Prairie isn't a spell.)
Fire-Lit Prairie enters the battlefield tapped unless you control four or more creatures.
All creatures have Islandwalk.
: 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.
