(: Add or to your mana pool.)
When Slagheap-works enters the battlefield, sacrifice it unless you pay 3 life.
: Slagheap-works becomes a 2/1 red and blue Giant creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Slagheap-works becomes a 2/1 red and blue Giant creature until end of turn. It's still a land.
