Mine

"We must get iron and diamonds for our soldiers, and gold for our coffers master!" '''The little councilor walks away with a limp... you decide to head his council and actually get a mine going.''' Building Requirements:
 * Name: Mine
 * Tax Modifier: 50 (5,000 per object)
 * Size: 20*20
 * Protected by the server: No
 * Limit Per City: 1
 * A stairway going to bedrock.
 * 5 diamond pickaxes.