Crumbling Civilization

Crumbling Civilization enters the battlefield
tapped.
When Crumbling Civilization enters the
battlefield, put a 0/1 colorless Eldrazi Spawn
creature token onto the battlefield. It has
"Sacrifice this creature: Add {1} to your
mana pool."
{t}, sacrifice Crumbling Civilization: Add {w}.
{t}: Add {c}.