Drill Grounds Expansion
Increase Drill Grounds Capacity
Max level: 5
Research levels
| Level |  Power |  Food |  Iron |  Coin | Base research time | Requirements |
|---|---|---|---|---|---|---|
| 1 | 3,300 | 1,521,900 | 1,521,900 | 4,565,800 | 1 day 9 hr 2 min |
|
| 2 | 8,300 | 3,462,400 | 3,462,400 | 10,387,200 | 3 days 17 hr 50 min |
|
| 3 | 15,600 | 7,478,800 | 7,478,800 | 22,436,300 | 7 days 20 hr 39 min |
|
| 4 | 25,400 | 13,611,400 | 13,611,400 | 40,834,100 | 14 days 7 hr 21 min |
|
| 5 | 37,700 | 21,267,800 | 21,267,800 | 63,803,300 | 22 days 7 hr 37 min |
|