Underground Sandstone enters the battlefield tapped unless you control two or more creatures.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
, Sacrifice Underground Sandstone: Add to your mana pool.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead., Sacrifice Underground Sandstone: Add 
to your mana pool.
