(: Add or to your mana pool.)
When Green Store enters the battlefield, sacrifice it unless you pay 1 life.
: Green Store becomes a 2/1 green and white Elf creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Green Store becomes a 2/1 green and white Elf creature until end of turn. It's still a land.
