When Island Flagstones enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
: Island Flagstones becomes a 2/1 blue and white Shapeshifter creature until end of turn. It's still a land.
.
: Add 
or to your mana pool.: Island Flagstones becomes a 2/1 blue and white Shapeshifter creature until end of turn. It's still a land.
