from level 26
| Origin: | Merchant: Architect | 5.990  |
| Valentines Event 2020-2024 | 3.490  |
|
| Valentines Event 2019 | 2.990 |
|
| Spring Bundle IV |  (100%) |
|
| Fanatic Bundle 1 |  (100%) |
| Need a patent construction: | NO |
| Build time: | 40 seconds |
| Size building: | 3×3 field |
| Possibility of improving: | NO |
| Can trade: | NO |
| After the demolition returns to star menu: | YES |
In the building, we can activate zone buffs that work on an adventure:
| Appearance | Name | Cost | Effect | Duration | Cooldown |
 |
Rough Star Chart | 820  + 20  |
Reduces travel time for Generals by 25% on Home Island and Adventure Island. The buff only applies to adventure started while the buff is active. |
02:00 hours | 47:00 hours |
 |
Normal Star Chart | 750  + 30 |
Reduces travel time for Generals by 50% on Home Island and Adventure Island. The buff only applies to adventure started while the buff is active. |
02:00 hours | 47:00 hours |
 |
Detailed Star Chart | 810  + 40 |
Reduces travel time for Generals by 75% on Home Island and Adventure Island. The buff only applies to adventure started while the buff is active. |
02:00 hours | 47:00 hours |
COOLDOWN:
| Number of Buildings: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Time: | 47:00h | 23:30h | 15:40h | 11:45h | 09:24h | 07:50h | 06:43h | 05:52h | 05:13h | 04:42h |
After the purchase of the building is active only Rough Star Chart
Normal Star Chart we can buy from the merchant for 399 
or 799 
Detailed Star Chart we can buy from the merchant for 599 or 1.299
Immediately Upgrade a Building: 1
Move a Building: free