老石匠的幽灵
Keepers of the Stone我曾经用石材建造了许多结实的房屋，现在我需要你对这些房屋进行修复和改进，让它们能经受住时间的考验。
Keepers of the StoneKeepers of the Stone我曾经用石材建造了许多结实的房屋，现在我需要你对这些房屋进行修复和改进，让它们能经受住时间的考验。
Upgrade a building: Frog House
4 
Frog House upgraded to level 2
Upgrade 4 building(s) to level 2: Frog House. You can do this by selecting it and opening the upgrade tab in the building panel.
Existing upgrades of the main building count.
No investigation time
Next consequence in 30 min at the selected elapsed time.
