Little Dragons/Buildings

Crossbreeding

 * Cost: 3000 coins.
 * Level requirement: ??.

Energy Well

 * Cost: 100 coins.
 * Level requirement: ??.


 * Options
 * 5 Energy, 20 coins (4 coins/unit), takes 5 sec (1 sec/unit).
 * 20 Energy, 275 coins (13.8 coins/unit), takes 5 min (15 sec/unit).
 * 75 Energy, 950 coins (12.7 coins/unit), takes 30 min (24 sec/unit).

Big Energy Well

 * Cost: 24,950 coins.
 * Level requirement: 10


 * Options
 * 300 Energy, 4950 coins (16.5 coins/unit), takes 2 hours (24 sec/unit).
 * 800 Energy, 14,950 coins (18.7 coins/unit), takes 6 hours (27 sec/unit).
 * 3000 Energy, 74,950 coins (25.0 coins/unit), takes 24 hours (29 sec/unit).

Huge Energy Well

 * Cost: 74,950 coins.
 * Level requirement: 16.


 * Options

Nursery

 * Cost: 10 cash.

Nursery II

 * Cost: 25 cash.

Nursery III

 * Cost: 50 cash.

Viking Agency

 * Cost: 2000 coins.
 * Level requirement: ??.

There is only one use for the Viking Agency: select a dragon to go on a mission. This dragon will disappear from its habitat and no longer generate coins for 24 hours while the mission takes place. The habitat's population does not change, as the spot is reserved for the dragon's return. Upon completion, coins, energy, and even cash can be rewarded. The higher the level the dragon, the higher the chances of getting good rewards.
 * Options

??
 * Example rewards