(: Add or to your mana pool.)
Sandstone-works enters the battlefield tapped.
: Sandstone-works becomes a 2/1 red and blue Ape Dwarf creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Sandstone-works becomes a 2/1 red and blue Ape Dwarf creature until end of turn. It's still a land.
