To unlock buff, you should buy the appropriate license:
for 560 
for 795
| Appearance | Name | Description | Costs | Production Time |
 |
Efficient Traps | Increases the production of building hunter and deerstalker hut about 2x in 12 hours a radius of 4 squares. |
300  + 150  + 50  = |
|
 |
Platinum Horseshoes | Adds 20% movement speed to all generals on an adventure for 4 hours. |
1.200  + 400  = |
|