Mine

Upgrades
Mine can be upgraded up to two times. Whether you get or  and how many charges depends on the number and resource of ore veins covered by the Mine. You can choose the same upgrade for both Level 1 and Level 2.

LEVEL I (Choose 1) Cost: 20 / 20 LEVEL II (Choose 1) Cost: 14 / 4 / 12 + 20 / 20
 * Pit Pony: an average amount of additional charges, +50% production speed in the Mine.
 * Minecart: an average amount of additional charges, an automated Minecart that transports resources from the Mine to the nearest Warehouse.
 * Box Crib: a large amount of additional charges.
 * Pit Pony: an average amount of additional charges, +50% production speed in the Mine.
 * Minecart: an average amount of additional charges, an automated Minecart that transports resources from the Mine to the nearest Warehouse.
 * Box Crib: a large amount of additional charges.