(: Add or to your mana pool.)
When Isle Furnace enters the battlefield, sacrifice it unless you pay 2 life.
: Isle Furnace becomes a 2/1 blue and red Crab creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Isle Furnace becomes a 2/1 blue and red Crab creature until end of turn. It's still a land.
