HP Boost
Increase all Heroes' HP
Max level: 5
Research levels
| Level |  Power |  Food |  Iron |  Coin | Base research time | Requirements |
|---|---|---|---|---|---|---|
| 1 | 16,400 | 38,282,000 | 38,282,000 | 114,845,900 | 33 days 11 hr 26 min |
|
| 2 | 41,700 | 91,111,100 | 91,111,100 | 273,333,300 | 48 days 4 hr 56 min |
|
| 3 | 70,500 | 118,444,400 | 118,444,400 | 355,333,200 | 57 days 20 hr 19 min |
|
| 4 | 104,600 | 165,822,200 | 165,822,200 | 497,466,500 | 69 days 9 hr 59 min |
|
| 5 | 145,000 | 232,151,000 | 232,151,000 | 696,453,100 | 83 days 7 hr 11 min |
|